How Many Bedrooms For A 500 Gallon Septic Tank Aerator? (Correct answer)

What size septic tank do I need for 3 bedrooms?

  • Septic Tank in Gallons Size Based on Number of Bedrooms Number of bedrooms Minimum Septic Tank Capacity (Gallons) Minimum Septic Tank Liquid Surface Area 0 bedrooms 750 gal. (2) – obsolete in NYS 1, 2, or 3 bedrooms 1,000 gallons 27 sq.ft. 4 bedrooms 1,200 gallons 34 sq.ft.

How big of a septic tank is needed for a 3 bedroom house?

The correct size of the septic tank depends mostly on the square footage of the house and the number of people living there. Most residential septic tanks range in size from 750 gallons to 1,250 gallons. An average 3-bedroom home, less than 2500 square feet will probably require a 1000 gallon tank.

How long should a septic tank aerator run?

The aerator should run 24/7 nonstop and should not cost more than 10 dollars a month to run. If you electric bill is high something else is causing it or the system is not correctly hooked up.

How do you size an aerobic septic system?

Aerobic units should be large enough to allow enough time for the solids to settle and for the wastewater to be treated. The size of most units range from 300 to 1,500 gallons per day, but local regulations often require that the unit be at least large enough to handle 500 gallons of wastewater per day.

How long does an aerator last?

The lifespan of your aerator will vary based on the size of the aerator, the frequency with which it is used, the size of your tank and what elements the aerator is exposed to. Most pumps last anywhere from two to five years before they need to be replaced.

What happens when septic aerator stops working?

If the aerator in your septic system stops working, your system will naturally turn from an aerobic environment to an anaerobic environment, a much slower, much less efficient environment for breaking down the solids in your system.

Is a 500 gallon septic tank big enough?

The minimum tank size for a three bedroom house is 1200 gallons. 500 or 750 gallon tanks used to be quite common in old houses, but they are not large enough for modern households, and are from a time without automatic washers, large spa tub, dishwashers, or multiple daily showers.

How often should you pump your septic tank?

Inspect and Pump Frequently The average household septic system should be inspected at least every three years by a septic service professional. Household septic tanks are typically pumped every three to five years.

How big is a leach field for a 3 bedroom house?

For example, the minimum required for a three bedroom house with a mid range percolation rate of 25 minutes per inch is 750 square feet.

Can a septic tank be too big?

A septic tank that is too big will not run well without the proper volume of wastewater running through it. If your septic tank is too big for your house, there wouldn’t be sufficient collected liquid required to produce the bacteria, which helps break down the solid waste in the septic tank.

What size septic tank do I need for a tiny house?

Tiny homes typically require a 500 to 1,000-gallon septic tank. Though, it’s not always possible to implement a tank of this size. In some states, for example, the minimum tank size is 1,000 gallons. There may be exceptions to this rule if your home is on wheels.

SepAerator Value Package – Septic Tank Aerator

  • Hiblow Septic Air Pump with Patented WonderfuserTM Diffuser Assembly
  • 3.7 cfm, 120VAC, 1.6A, 71 Watts, 36dBA
  • Patented WonderfuserTM Diffuser Assembly
  • The following items are included: 10 feet of Spa-Flex Heavy Duty Air Line
  • Other Miscellaneous Installation Components
  • Installation and Maintenance Manual

Applications for the SepAerator® Value Package

  • Converts an existing septic tank into an advanced aerobic treatment system
  • Eliminates the need for clogging biomat in drainfields and other secondary treatment systems
  • And Engineered to be installed in septic tanks with capacities ranging from 750 gallons up to 2000 gallons
  • Designed to be used in multiple compartment septic tanks or multiple tank systems
  • Developed by industry experts with more than 25 years of experience in the aerobic wastewater treatment industry

Additional Detailed Information

  • The SepAerator® System and Its Operation
  • The SepAerator® Aerobic Process
  • The SepAerator® System and Its Operation The WonderfuserTM Diffuser Assembly is comprised of three parts: Decide on the most appropriate SepAerator® package for your application
  • SepAerator® Frequently Asked Questions
  • SepAerator® Sampling Results
  • SepAerator® Success Stories
  • Frequently Asked Questions about the SepAerator®


The SepAeratorTM is equipped with only the highest-quality air pumps, which have been developed and tested to provide trouble-free operation for many years. A high-quality and high-performance septic air pump, the Hiblow air pumps have shown to be extremely reliable. The Hiblow air pump included in the SepAeratorTM Premium package has a flow rate of 3.7 cfm and is capable of treating up to 500 gallons of wastewater per day or a septic tank with a capacity of up to 2000 gallons. This air pump will need around $4 to $8 in electricity each month to run.

The diaphragms in the air pump have an average life span of 5 to 7 years on average.

Even if you elect to replace the diaphragms in your unit when they fail, a pump will last you around 10 to 12 years.

Patented Wonderfuser™ Assembly

The Wonderfuser diffuser assembly from Septic Solutions® is a one-of-a-kind design that is exclusively available in the SepAeratorTM packages. In addition to being maintenance-free, the Wonderfuser is extremely successful at not only transferring oxygen into wastewater but also breaking down big solids into little pieces to make digestion more efficient. The Wonderfuser will be lowered into your septic tank and placed on the bottom of the intake side of the tank. The base of the diffuser assembly weights 13 pounds in order to ensure that it will rest solidly on the ground.

  1. The SepAeratorTM Wonderfuser delivers oxygen into a septic tank roughly 10 inches above the bottom of the tank through a series of 48 orifices that are oriented downward at approximately 35 degrees from top to bottom from the top to the bottom.
  2. In the Wonderfuser, there is a deflection region 15 inches from the bottom, which allows all rising air bubbles to be deflected outward and around the diffuser in a 360-degree circle.
  3. Second, the deflector causes the tank to roll as a result of the rolling movement.
  4. The SepAeratorTM Wonderfuser is unique in that it uses a deflected rolling movement to break down most solids that enter the tank into extremely small particles within 30 seconds.
  5. Whenever those solids are swiftly broken down into little particles that are constantly moving about inside the tank, aerobic bacteria that are created as a result of adequate oxygen being delivered into the tank may attach themselves to those small particles very fast and readily.

Because these aerobic bacteria can detect and consume many smaller and moving particles very fast, the quality of the effluent can be significantly improved overall.

Heavy Duty Spa-Flex Airline

An extremely high grade material, which is both robust and flexible, is used to construct the spa-flex air line. Because of its adaptability, it can be installed in even the most challenging of situations. Simply screw the threaded brass adapter that is linked to the air line into the fitting located at the top of the diffuser to complete the installation. By lowering the diffuser into the tank and even swinging it over into place if necessary, the spa-flex may help you save time and money. Curve the line up through the aperture and out the side, then up and into the bottom of the housing, where the other end is connected to the air pump (see illustration).

If you wish to expand the reach of the pump to a more remote place, this spa-flex may be bonded to 12 schedule 40 pvc pipe.

Installation and Maintenance Manual

Each SepAeratorTM kit includes a comprehensive Owners’ handbook that has all of the information needed to not only simply install the SepAeratorTM but also lots of information on how to use it properly after it has been installed. You will receive an abundance of information when you purchase a SepAeratorTM along with all of the technical help you may require to answer any and all of your questions both before and after installation by calling 1-877-925-5132 after you make your purchase. If you have any questions, please do not hesitate to contact us.


When a stool is flushed in the home, the wastewater drains into a drainpipe that transports it underground to a septic tank, where it is treated. Essentially, the objective of a septic tank is to provide an environment for anaerobic bacteria (bacteria that flourish without oxygen) to break down waste over time. Having an entrance baffle as well as an exit baffle is important to prevent waste from entering the tank and float right over its top before discharging to a secondary treatment system, which is what happens in most homes (drain field, sand filter, mound system, drip system, cesspool, dry well, etc.).

It is common for the septic tank discharge to include 70 to 80 percent raw sewage to be discharged to the drain field, where the raw sewage is treated by passing through a build-up of a material known as biomat.

What is Biomat?

In the secondary treatment system, a biomat is a layer of bacteria that develops in the soil throughout the treatment process. This biomat is extremely significant in the treatment of raw sewage that is often discharged from a septic tank or a cesspool. Septic tank output contains several minute waste particles and pathogens that must be processed before soil absorption can take place, and this is what this device is designed to do. A lack of this procedure allows improperly treated effluent to pollute groundwater, which can then end up in wells, streams, ponds, or even the surface of the earth itself.

Once the septic tank effluent is discharged to either a drain field or a seepage bed, the biomat that forms will efficiently reduce the waste particles and pathogens to an acceptable level before they can be transported further into the soils around the drainage field or seepage bed.

Septic tank effluent that has not been adequately treated should be regarded unsatisfactory and should be addressed promptly.

The Issues Caused By Biomat

During the course of time, the biomat grows in size, making it impossible for effluent discharged from the septic tank to pass through it, causing the effluent level inside the drain field trenches to rise, where it will be absorbed through the walls of the trenches as they develop. After a period of time, the sidewalls of these pits will begin to choke with accumulated debris. As soon as the bottom and sides of these trenches get blocked with biomat, the effluent will either begin to back up into the septic tank or surface in the yard above the drain field, depending on its location.

  • If the effluent level in the septic tank rises by 4 inches as a result of the inability of the sewage to reach the absorption field, the effluent will begin to back up the entrance line.
  • It is the intention of biomats to slow the flow of wastewater to the soils, giving the soils more time to filter out germs and viruses.
  • It is therefore possible for the septic tank effluent to either back up into the residence or discharge to the ground surface, which will result in ponding of water.
  • Septic systems that are failing due to biomat accumulation include, but are not limited to, water or sludge rising at the drain field, high water levels in the septic tank or distribution box, and sluggish running and gurgling drains and toilets, among other symptoms.

How The SepAerator® Can Save Your System

Biomat is comprised of anaerobic bacteria and the waste formed by these anaerobic bacteria as a result of their digestion of the 70 to 80 percent organic matter released from a septic tank, respectively. When you use the SepAerator® to convert your septic tank to the aerobic process, the septic tank transforms into a wastewater treatment plant that discharges around 95 percent pure, odorless water. It is only by eliminating this organic material waste from the effluent that you are able to completely eradicate the food supply that the biomat relies on to develop and live in the drain field.

  • To learn more about the SepAerator®, click here.
  • The SepAerator® will inject enormous volumes of oxygen into the septic tank, resulting in the fast proliferation of aerobic bacteria within the tank as a result of the introduction of oxygen.
  • Septic tanks are designed to process waste rather than releasing it into a drain field, seepage bed, sand filter, mound system, cesspool, or any other form of secondary treatment system you may have.
  • As soon as the waste is treated within the septic tank and clean water is sent to the secondary treatment system, the biomat will lose its food supply and will die within a short period of time.
  • As a result of the clean effluent created by the SepAerator® being combined with high volumes of aerobic bacteria entering the secondary treatment system, the biomat will be destroyed, allowing the clean effluent to readily permeate back into the soils.

Because aerobic bacteria are extremely successful at decreasing disease-causing pathogens, the septic system has been completely rejuvenated and transformed.

SepAerator® Value Package Septic Tank Aerator Downloadable Documents

  • POSTING a QUESTION or COMMENT about the size of anaerobic treatment unit ATU tanks

InspectAPedia does not allow any form of conflict of interest. The sponsors, goods, and services described on this website are not affiliated with us in any way. Aeration pumps for septic tanks and aerobic treatment units. The size and design requirements for aerobic septic tanks, also known as ATUs, and aeration pumps are discussed in this article series. There is no charge. The four-chamber aerobic wastewater treatment unit seen at the top of this page was modified from a sewage system handbook published by the Taranaki Regional Council in the country of New Zealand.

See also:  How To Collect Methane From Septic Tank? (Best solution)

For this topic, we also have anARTICLE INDEX available, or you may check the top or bottom of the page.

Aerobic Treatment Unit Aerator Pump Requirements

  • In home aerobic septic systems, diaphragm type aerator pumps are likely the most extensively utilized form of aerator pump. Linear air pumps, which are used in aerobic septic systems, compress and pump air using a diaphragm or pistons. Brands such as HiBlow, Medo, and Thomas, as well as Cyclone, Secoh, and Alita air pumps, are examples. rotary-vane air conditioning Pumps for aerobic septic systems that employ spinning carbon steel vanes to compress the air are known as compressor air pumps. Durable, requires more power, and is noisier than linear air pumps. Regenerative Blowers for aerobic septic systems are utilized on Hoot septic systems, Fast septic systems, and Bio-Microbics systems, among other types of systems. These pumps are often controlled by a timer, which allows them to be turned on and off as needed. They do not run continually
  • Instead, they run intermittently.

Typical Aerobic Septic Air Pump Capacity Ratings

The output of aerobic septic air pumps is measured in cubic feet per minute (CFM) or liters per minute (LPM) of air flow. A common septic aerator pump may provide 5 CFM (80 LPM) of air output, which is normal. The normal flow rate of septic air pumps for residential septic systems is around 2 to 8 cfm, or approximately 40 to 200 LPM of air flow rate. There is, in fact, something difficult to grasp about these evaluations. In fact, when the output is restricted, as in a septic tank, a septic air pump rated for 100 LPM air output at “open flow” (or un-restricted output) would actually give a lower flow rate than when the output is unrestricted.

Question: How do I size the correct aerator pump for my ATU?

11/5/2015 Josh asked:How can I determine the proper size of an aerator pump for my ATU? My system has a capacity of 600 gallons. We have 5 individuals living in our home, with visitors occasionally numbering as high as 10. Is it necessary to have two pumps, or may I operate them in parallel?

Reply: aerobic septic pump sizing table

This is a very valid inquiry, and the answer is “I don’t know.” The correct aerator pump size or cubic feet per minute of air supply required relies on at least these criteria, all of which sum up to “call your aerobic septic designer, aerobic pump sales or supplier contact”:

  • The intricacies of how your particular system was constructed, which vary depending on the company and model you have
  • Average and maximum daily wastewater flow into the septic system
  • The size of the septic tank
  • The design of the actual aerator or bubbler
  • The distance from the aerator pump tank
  • The size or diameter of the piping
  • The length and limits such as the number of elbows
  • And other factors. because of the depth of the bubbler, which is a measure of how far the aerobic pump must drive air down and hence how much pressure the aerobic pump will meet

Intricacies of how your individual system was developed, which vary depending on the manufacturer and model; Water flow rates into the septic system, including average and maximum daily wastewater flows; the septic tank’s capacity; the actual aerator or bubbler’s design; the distance from the aerator pump tank; pipe sizes or diameters, length; and constraints, such as the number of elbows; because of the depth of the bubbler, which is a measure of how far the aerobic pump must drive air down and hence how much pressure the aerobic pump will meet.

Aerobic Septic System Aerator Pump Sizing Table for Residential-sized Septic Systems

Average Daily Wastewater Flow in Gallons or Liters Aerobic Septic Aerator Pump Delivery of Air per Minute Comments
500 – 600 gpd / 1900 – 2300 lpd 4-5 cfm / 80 – 100 lpm Example: Hoot® Troy Air Alternative this air pump fits Hoot septic system models H450, H500, H600 and LA 500.Older Hoot septic systems use a different blower type – a “regenerative blower” so check your system requirements.
750 gpd / 2800 lpd 5.2 cfm / 120 lpm Example: Hoot Troy 750 GPD septic air pumps work with Hoot Troy Air models H750 and LA 750.
900 – 1000 gpd / 3400 – 3800 lpd 7 cfm / 150 lpm Example: Hoot Troy Air Alternative 1000 GPD septic pump works with Hoot Troy Air Models H1000 and LA 1000
1200 – 1500 gpd / 4500 – 5700 lpd 8.4 cfm / 200 – 1000 lpm Example: Hoot Troy Air Alternative septic air pump works with the Hoot Troy Air models H1600 and LA 1500.

Notes to the table above

Cfm is an abbreviation for cubic feet per minute. gpd is an abbreviation for gallons per day in the United States. lpd = litres per daylpm = liters per minute (or litres per minute in the United Kingdom) We recommend that you verify that the aerobic pump you choose has been authorized by the NSF (National Small Flows) for use with your system before purchasing it. You may get a more exact estimate of your daily wastewater consumption fromSEWAGE FLOWDESIGN FLOW ESTIMATESand then return to this page by using the “back” button on your browser.

It is recommended that you consult with the designer or manufacturer of your individual aerobic septic system since the manufacturer’s parameters may differ from those included in this general table.

Making this change alone, without making other critical design changes such as adding outlet filters or a settlement chamber, may agitate the sewage in the septic tank, causing solids to flow into the septic drainfield or absorption bed, resulting in the clogging of the drainfield or absorption bed and the rapid destruction of the system.

Aerobic Septic System Air Pump Specifications

2017/09/21 In response to Dexter’s question, “How do you check the air pressure on a pump to ensure that your diffuser is not clogged?” and “What should the air pressure measurement be?”

Reply: aerobic septic air pumps are rated as open flow in CFM or LPM but air pressure readings can be diagnostic

Thank you for your inquiry, Dexter. If you’re wondering what the optimal air output for an aerobic septic system air pump should be, there isn’t a single “correct answer” (also referred to as septic aerator pump or septic diffuser pump, or septic air pump or septic “compressor” pump). This is because, based on the size of the septic tank and the amount of waste produced on a daily basis, the pump model will be selected to meet a certain output rate. A septic air pump’s rating is often determined by water pressure rather than air pressure, because the pump’s output end is meant to be exposed to water and ultimately the atmosphere.

Another way to say it is that, although though the aerobic air pump has a pump operating air pressure capacity, the pump output is often given by the manufacturer as “open flow” capacity in cubic feet per minute (CFM) (or LPM).

That is why I stated that it is difficult to quantify.

What Air Pressure Could be Seen at a Septic Air Pump?

Using the Hiblow HP-80 aerobic septic air pump as an example, the manufacturer rates the pump’s maximum airflow at 4.2 cfm (119 LPM) when the pump is operating at 0 p.s.i., and the rated air flow will be LOWER – about 80 LPM (2.83 cfm) when the pump is operating at the rated pressure of 2.13 p.s.i. when the pump is operating under actual installed conditions. As a result of the fact that unique septic air pump specifications will change among manufacturers’ brands and models even before the pump is installed, you should make a note of the precise brand and model of the pump you are using.

  • The pressure range will most likely be between 1.5 and 5 psi.
  • To put it another way, if we went underwater (I don’t want to swim beneath sewage) and went down to 30 feet, we would be at one ATM of pressure, which is approximately 14.6 psi more pressure than being on the surface of the ocean at sea level.
  • 1/6 of 14.6 psi is equal to 2.4 psi.
  • If the pressures at our magic Tee, which we inserted in the air line, were lower than the manufacturer’s specifications, the pump (or the air line) is most likely malfunctioning (or there is an air leak).

If we notice pressures rising over what the manufacturer has specified, it is possible that the diffuser has become blocked. However, skipping the tee and the pressure gauge and simply looking for bubbles is more convenient.

Question: what are the aerobic septic pump tubing or piping distance limitations?

The following illustration depicts the drop in net air flow or CFM as a function of increasing pressure in the delivery system over zero limitations at the pump output for the Secoh EL-series aerobic pumps: CFM or LPM performance curves for the Secoh EL-series aerobic pumps. – derived from Secoh, which is discussed in further detail below. 2019/02/18 Bill Grambsch wrote: “I’d want to relocate my Aeration air pump 50 feet away from my septic tank,” he explained. I have 50 feet of 1/2-inch PVC tubing as well as the electricity to run the air pump.

Do you have any difficulties or concerns?

Is there any reason why I cannot add a 50-foot air hose to the system to eliminate the noise?

Reply: keep aerobic air pump tubing or pipes as short and straight as possible or risk inadequate aerobic treatment and system failure

Bill, Thank you for presenting such a thought-provoking question: What is the impact of distance on the performance of aerobic septic tank aerators? or What is the maximum length or distance of tubing that may be used with an aerobic septic aerator pump? The Secoh EL-80 septic pump is available in a variety of versions with air supply rates ranging from 2.83 CFM to 4.23 CFM. The pump is rated as Air Flow: 80LPM or 2.83 CFM to 4.23 CFM Open Flow. The performance curves for Secoh aerator pumps given below (which were taken from the company’s sales brochure) clearly demonstrate that as the pump’s “PSI” increases, the flow rate declines.

It is vital to comprehend the concept of “open flow.” It is possible to measure open flow at the pump’s exit since there is no resistance on the pump’s side.

The following is how septicsolutions, a vendor of septic aerators, puts up the problem: It is customary for the size of the air pump to be dictated by the volume of the tank, the kind of air diffusers installed in the tank, and the number of GPD (Gallons Per Day) that the system is meant to treat.

Keep an eye out for: In practice, this implies that, assuming that your septic aerator pump was correctly sized and installed in the first place, you should not relocate it more than 50 feet away without first contacting with Secoh or the firm who built and installed your aerobic septic system.

  1. Keep in mind that if the air flow rate, volume, duration, or CFM / LPM in an aerobic septic tank is insufficient, the expense might be crippling.
  2. I’m sorry for not being able to provide a more precise response, such as – yes, if you use 3/4″ tubing – but, like Secoh, from my vantage point in central Mexico, I cannot see your aerobic septic installation and so have no more information about it to share with you.
  3. Septic Solutions is located at 314 Center St.
  4. According to Secoh, the following pipe requirements are necessary for their air pumps: PIPING: Choose tube sizes, lengths, and attachments carefully to ensure that pressure loss is kept to a minimum.
  5. Using tubing with a diameter that is greater than the port on the device (inside diameter min.
  6. There are no elbows and the bends are of great radius.
  7. Diffusers for aeration with low air loss – For further information, please contact Secoh EasyPump at 50 West Drive, Melbourne, Florida 32904 (phone: 321-253-1999, toll-free: 1-800-225-4498, or email: [email protected]). is the website or online store for Secoh. was the original source, which was obtained on February 18th, 2019.

Other aerobic septic system aerator-air pump checks you can make

Make sure of it.

  1. The fact that the aerobic aerator pump is operational
  2. Aerator pump is providing air to the septic tank as shown by the appearance of air bubbles at the tank top inspection port
  3. This includes making sure that the aerator pump tubing or pipe is not restricted, bent, kinked, or clogged with debris. That you are completing the periodic maintenance on your aerator pump in accordance with the manufacturer’s recommendations – samples of aerobic pump maintenance and installation manuals are provided below
  4. When the pump stops operating or is turned off, certain septic air pump types incorporate an alert feature to notify you of the situation. The fact that you may leave your aerobic system without its aerator means that the system is not operating well, it is not treating sewage effectively, and the system might fail in a matter of days
  5. This is a convenient feature.

Aerobic Septic Pump Sources

This material has been transferred to AEROBIC SEPTIC AERATOR PUMP SOURCES, which includes sources for anaerobic septic pumps, as well as manuals and technical instructions. Continue reading atSOURCES OF AEROBIC SEPTIC AERATOR PUMP Alternatively, choose a topic from the closely related articles listed below, or browse the entireARTICLE INDEX. Alternatively, check AEROBIC SEPTIC SYSTEMS, ATUs- the official home page for Aerobic Septic Systems.

Suggested citation for this web page

AEROBIC SEPTIC AERATOR PUMPSatInspect A online encyclopedia of buildingenvironmental inspection, testing, diagnosis, repair, and problem prevention advice. AtInspect A online encyclopedia of building environmental inspection, testing, diagnosis, repair, and problem prevention advice. Alternatively, have a look at this.

See also:  How Long Should A Septic Tank Tee Be? (Question)


Alternatives include asking a question or searching InspectApedia using the SEARCH BOXfound below.

Ask a Question or Search InspectApedia

Questions, answers, or comments on septic effluent disinfection systems – which chemicals to use and which to avoid using – are welcome. We encourage you to use the search box just below, or if you prefer, you may make a question or remark in theCommentsbox below and we will get back to you as soon as possible. InspectApedia is a website that allows you to search for things. Please keep in mind that the publication of your remark below may be delayed if it contains an image, a web link, or text that seems to the program to be a web link.

We sincerely apologize for the inconvenience.

Technical ReviewersReferences

Citations can be shown or hidden by selecting Show or Hide Citations. is a publisher that provides references. Daniel Friedman is an American journalist and author.

AEROBIC Septic System Tanks ATU tanks Aeration Septic System Tanks)

  • POSTING a QUESTION or COMMENT about the size of anaerobic treatment unit ATU tanks

InspectAPedia does not allow any form of conflict of interest. The sponsors, goods, and services described on this website are not affiliated with us in any way. Sizes of Septic Tanks for Aerobic Treatment Units: The following sections outline the size and design criteria for aerobic septic tanks, often known as ATUs. This section contains ideas and items for aerobic septic treatment units (ATUs), also known as fine bubble aeration systems, for onsite waste disposal. ATUs are also known as Aerobic Wastewater Treatment Units (AWTs) in the United Kingdom, Australia, and New Zealand.

There is also a list of product suppliers for aerobic septic systems.

The four-chamber aerobic wastewater treatment unit seen at the top of this page was modified from a sewage system handbook published by the Taranaki Regional Council in the country of New Zealand.

For this topic, we also have anARTICLE INDEX available, or you may check the top or bottom of the page. Use the SEARCH BOX to discover the information you’re looking for quickly.

Aerobic Treatment Unit Tank Size Requirements

In most cases, a home aerobic septic treatment unit does not operate constantly, just as the intake to it does not operate continuously either. According to the same guidelines as for a typical septic system, the ATU size or capacity should enable 50 to 100 gallons of wastewater per day for each inhabitant in the building. It is required by certain jurisdictions that the system have a minimum capacity to take 500 gallons of effluent daily.

Safe aerobic treatment tank size advice

Most of the time, a home aerobic septic treatment unit does not operate constantly, just as the intake to the unit does not operate continuously. According to the same guidelines as for a traditional septic system, the ATU size or capacity should allow 50 to 100 gallons of wastewater per day for each inhabitant in the building to be accommodated. The minimal capacity required by certain jurisdictions is 500 gallons per day of wastewater acceptance.

Aerobic treatment tanks in cold climates

Depending on where you are installing your ATU tank (cold or warm area), it may be essential to insulate the treatment tank (with 2″ solid foam panels) in order to keep the tank temperature high enough (above 54 degrees Fahrenheit) for aerobic processing to continue in cold weather. In some cases, high temperatures of 131 to 149 degrees Fahrenheit are required by thermophilic bacteria.

ATU Flow: Continuous or Intermittent Aerobic Pumping Systems

There are two fundamental ATU designs that allow for intermittent or continuous flow through the system, respectively.

Intermittent flow aerobic septic systems

In the same way that most home septic systems do not receive wastewater continually but rather occasionally, the ATU may be configured to switch on and off the aerator and agitator as needed. An method to septic design that uses intermittent flow septic systems, such as aerobic or aeration treatment designs, is known as a “batch system” design technique.

Continuous flow aerobic treatment system designs

Other aerobic or aeration septic treatment systems, particularly aerobic systems that must service a bigger facility where wastewater intake is likely to be continuous, may be able to function on a continuous basis themselves as well. These designs are referred to as “continuous flow” aerobic treatment systems, which is self-explanatory.

How to SelectWhere to Buy an Aerobic Septic Tank Aerator Pump

11/5/2015 Josh asked:How can I determine the proper size of an aerator pump for my ATU? My system has a capacity of 600 gallons. We have 5 individuals in our home, with visitors occasionally numbering in the tens. Is it necessary to have two pumps, or may I operate them in parallel?


Josh ATU size or capacity is set in the same way as a traditional septic system by enabling 50 to 100 gallons of wastewater per day per building inhabitant, in very broad words, to be discharged. Indeed, a lot of aerobic septic designers recommend using two aerator pumps that are switched on and off alternately to ensure that both are working at all times.

When the ATU is designed in this manner, it ensures that it can continue to operate even if one of the pumps fails and requires repair or replacement. Please read the following article in this series for more information on aerobic pump sizing: AEROBIC SEPTIC AERATOR PUMPS.

Reader CommentsQ A

All levels are satisfactory, however the alarm has been activated. It’s unlikely that either the septic tank or the effluent dispersal system will be sufficient in their respective capacities. Consult with the manufacturer of your unique aerobic system or a septic engineer in your area to determine the capacity of your system. Surely, you’ll need a permit for your construction project. We are now in the planning stages of constructing a detached garage with a separate in-law apartment above it.

  1. Currently, we have an aerobic drip system that includes a 750 gallon tank and about 2250 linear feet of drip line.
  2. On a typical day of use, how long should you leave your sprinklers running for?
  3. Do the sprinklers and the irrigation system freeze, and if so, at what temperature do they do so?
  4. Dexter.
  5. Depending on your browser, you may need to clear your cache, and it may take up to 24 hours for the updated article information to display on your server.
  6. In order to ensure that your diffuser is not blocked, you should check the air pressure on the pump.
  7. To keep the system operating properly, the pump must be kept running.
  8. Author: Carol re-posting (no email) 2016/03/10 COMMENT: Is it preferable to leave a septic tank pump running all of the time or to only turn it on for a short amount of time occasionally to empty surplus water before turning it off?
  9. My system has a capacity of 600 gallons.
  10. Is it necessary to have two pumps, or may I operate them in parallel?
  11. Select a topic from the closely-related articles listed below, or browse the entireARTICLE INDEX for more information.

Suggested citation for this web page

SIZES OF AEROBIC ATU SEPTIC TANKS AT INSPECTION An online encyclopedia of building environmental inspection, testing, diagnosis, repair, and issue preventive information is available at Alternatively, have a look at this.


Alternatives include asking a question or searching InspectApedia using the SEARCH BOXfound below.

Ask a Question or Search InspectApedia

Questions, answers, or comments on septic effluent disinfection systems – which chemicals to use and which to avoid using – are welcome. We encourage you to use the search box just below, or if you prefer, you may make a question or remark in theCommentsbox below and we will get back to you as soon as possible. InspectApedia is a website that allows you to search for things. Please keep in mind that the publication of your remark below may be delayed if it contains an image, a web link, or text that seems to the program to be a web link.

We sincerely apologize for the inconvenience.

Technical ReviewersReferences

Citations can be shown or hidden by selecting Show or Hide Citations. is a publisher that provides references. Daniel Friedman is an American journalist and author.

Aerobic Septic Systems and Water Flows

Aerobic Septic Systems and Water Flows in the Home The majority of home aerobic wastewater systems have a daily capacity of 500 gallons or less (gpd). This may be true in a perfect world, but in real life, don’t put your money on it. Individual systems are tested with controlled flows over a 24-hour period in order to receive NSF certification. In the actual world, however, this is not how we employ them. When we use them, we do so over a 12- to 16-hour period, with the majority of our usage taking place in the morning and evening.

  1. It means that if you put 500 gallons per minute through the system in a single day, there will be problems.
  2. There are two issues that arise as a result of this.
  3. The bacterium must have enough time to complete its task before the sprinklers are activated.
  4. Solids settle out into the trash tank as wastewater moves through the system, and settable solids settle into the ATU as wastewater moves through the system.
  5. The intake of the pump is typically 10 inches above the bottom of the pump tank.
  6. The pump will attempt to move them through the distribution system if they are not removed.
  7. So, what can you do to prevent this from happening?

Distribute your water consumption throughout the day and week.

Tankless water heaters provide virtually limitless hot water, but they also result in lengthy showers.

Toilets that are leaking should be repaired immediately.

Slow down the flow of water!

You will save money if your flows are smaller and more consistent.

Consider the difference between 20 gallons per hour and 500 gallons per day. The aerobic wastewater system in your home is the most important appliance in the entire home. If you take good care of it, you will avoid the needless expense of repairing it. adm1naa3s2017-02-02T03:16:02+00:00

Learn how much it costs to Install a Septic Tank.

Septic tanks range in price from $3,157 to $10,367, or an average of $6,743. Installation of a conventional 1,000-gallon tank for a three-bedroom home might cost anywhere from $2,100 and $5,000. Materials range in price from $600 to $2,500, without labor. A comprehensive septic system, which includes a leach field (also known as a drain field), tank, and plumbing, can cost between $10,000 and $25,000 to install. A leach field installation might cost anywhere from $5,000 to $20,000, depending on the kind.

In the end, the cost of installing a septic tank is determined by the kind of system, the materials used, and the size of the tank.

This course will teach you about the several sorts of settings, such as conventional, drip irrigation, mound irrigation, evapotranspiration, recirculating sand, constructed wetland, and chambered irrigation.

Septic System Cost Estimator

Let’s run some numbers to see what the costs are. What part of the world are you in? What part of the world are you in?

National Average $6,743
Typical Range $3,157 – $10,367
Low End – High End $450 – $20,000

The cost information in this report is based on real project costs provided by 943 HomeAdvisor users.

New Septic System Cost

Most tanks and systems cost between $2,000 and $10,000 to install a new typical anaerobic septic system. Aerobic systems range in price from $8,000 to $20,000. Depending on the size of your property, the composition of the soil, and the level of the water table, you may even have to pay an extra $10,000 or more for an alternative, specialized drain or leach field. Septic systems are composed of three major components:

  • Septic tank: Either anaerobic (requiring no oxygen) or aerobic (requiring oxygen but more complicated but more efficient)
  • Water runs to a leach field after it has been cleaned and separated in the septic tank, where it will naturally drain through sand, gravel, and soil in a cleaning process before reaching the water table
  • Water table: Plumbing: A drainpipe to the tank, followed by another branching pipe to your field will be required.

Optional components include the following:

  • Some types of systems use a dose or pump tank, which pumps wastewater up into mounded or elevated leach fields and recycles the water in some cases. Pump for aeration: If your aquarium is equipped with an aerobic system, you’ll want an aerator to force oxygen into the tank.
Find Local Septic Tank Installers

The installation of a traditional anaerobic system typically costs between $3,000 and $8,000 on average. Anaerobic systems are often less expensive to build than aerobic systems, which are more complicated. However, because they are less effective at cleaning the tank, you will need a bigger leach field to accommodate the increased burden. An anaerobic septic system is a very basic system that consists of a pipe that runs from the home to the tank and a branching pipe that runs from the tank to the drain field, among other components.

Aerobic Septic System Cost

Aerobic systems, which are those that require oxygen to work properly, cost on average between $10,000 and $20,000 per system. If you’re moving from anaerobic to aerobic fermentation, you’ll almost certainly need a second tank, but the conversion will only cost you $5,000 to $10,000. Aerobic systems break down waste more effectively in the tank than anaerobic systems, allowing you to use a smaller drain field in many cases – which is ideal for houses with limited space. An aerobic wastewater system is a wastewater system that depends on aerobic bacteria (bacteria that thrive in the presence of oxygen) to break down trash in the tank.

You’ll need an aerator as well as an electrical circuit that connects to the system to complete the setup. Small, mounded, or speciality fields may necessitate the addition of a dose or pump tank to assist in pushing effluent (sewage or wastewater) upward or out in batches.

Get Quotes From Local Septic Tank Pros

Beyond the tank and leach field, there will be a few more costs to consider when creating your budget for the project. You may already have some of these costs included in your total project pricing, so make sure to get line-item prices on your estimate.

  • Excavation costs $1,200–$4,500
  • Building permits cost $400–$2,000
  • And a perc test costs $700–$1,300. Labor costs range from $1,500 to $4,000
  • The cost of septic tank material ranges between $500 and $2,000.
  • Plastic and polymer materials cost $500–$2,500
  • Concrete costs $700–$2,000
  • And fiberglass costs $1,200–$2,000.
  • 500: $500–$900
  • 750: $700–$1,200
  • 1,000: $900–$1,500
  • 1,200: $1,200–$1,600
  • 1,500: $1,500–$2,500
  • 2,000: $3,000–$4,000
  • 3,000: $4,500–$6,000
  • 5,000+: $7,500–$14,000
  • 500: $500–$900
  • 1,200: $1,200–$1,
See also:  What Is The Cost For Septic Tank Pumping? (Solved)

Leach Field Cost

Installing a leach or drain field, which is a component of your septic system, can cost anywhere from $3,000 to $15,000 in total. The cost of a typical drain field ranges from $2,000 to $10,000. The drain field, also known as the leach field, is the component of the septic system that is responsible for returning wastewater to the soil. Most of the time, a flooded area in the yard or a strong stink of sewage on the property is the first symptom of a problem with the drainfield. It is possible that you may require further treatment for blocked or flooded fields, which would increase the cost of the drain field repair from $10,000 to $50,000.

Alternative Septic Systems Cost

When you have a tiny property, a high water table, high bedrock, poor soil, or just wish to utilize less space, an alternate septic system is a good choice.

Mound Septic System Cost

Installing a mound septic system can cost between $10,000 and $20,000 dollars. In places with high water tables, thin soil depths, or shallow bedrock, this is the most costly system to build; yet, it is frequently required. In order to create a drain field, it uses a raised mound of sand rather than digging into the soil. Its extra cost is a result of both the additional technology required to pump sewage upward into the mound and the materials and labor required to construct the mound in the first place.

Recirculating Sand Filter Septic System Cost

Sand filter septic systems range in price from $7,500 to $18,500. They can be built above or below ground depending on the situation. In order to disperse the wastewater in the ground, they employ a pump chamber to force the wastewater through a sand filter. The liner of the filter box is normally made of PVC. This is accomplished by pumping the effluent through the sand and returning it to the pump tank, where it is then disseminated throughout the ground.

Drip Septic System Cost

Drip systems range in price from $8,000 to $18,000, depending on the size and complexity. They operate in the same way as previous systems, with the exception that they employ extensive drip tubing and a dosage mechanism. They deliver lower dosages over a shorter period of time, which is particularly effective at shallow soil depths. This method is more expensive than a standard system since it requires a dosage tank, a pump, and electrical power to operate.

Evapotranspiration System

Evapotranspiration systems range in price from $10,000 to $15,000 per system. In order to allow the liquid to evaporate from the top of an open-air tank, they employ a novel drain field configuration. They’re only usable in dry, arid areas with little rain or snow, thus they’re not recommended.

Built Wetland System

An evapotranspiration system might cost anywhere between $10,000 and $15,000.

In order to allow the liquid to evaporate from the top of an open-air tank, they employ a novel drain field configuration. In dry and arid areas with little rain or snow, they are solely helpful as a source of water.

Chambered System

Installation of chambered systems ranges from $5,000 to $12,000 dollars. They employ plastic perforated chambers surrounding pipes, which are frequently laid in sand, to keep them cool. Gravel is no longer required as a result of this. They are quick and simple to install, but they are more subject to crushing pressures, such as those caused by automobiles.

Septic Tank Replacement Cost

The cost of replacing a septic tank ranges from $3,000 to $10,000. From 30 to 40 years, you may anticipate your system to serve you well. The system may crack or corrode as a result of the failure and the resulting contamination of groundwater with toxic waste is an issue. When this occurs, the well water may get polluted, the yard may become marshy, and the septic system may become inoperable or fail completely. Here’s a breakdown of the various components of a septic tank, along with an estimate of their usual costs: Replacement of a septic tank pump costs between $800 and $1,400.

Replacement of the filter costs between $230 and $280.

Drain Field Replacement Cost: $7,500.

Septic System Maintenance Costs

It is essential that you pump and clean your septic tank at least once a year. In addition, you should get it examined at least once every three years. The proper maintenance of your septic tank will save you money in the long term, and it will also help you avoid potentially hazardous situations. The Environmental Protection Agency (EPA) suggests the following steps to keep your septic system in good working order:

Inspect and Pump Your Septic Frequently

Typically, the cost of septic tank pumping runs from $300 to $550, or around $0.30 per gallon – most septic tanks have capacities between 600 and 2,000 gallons. Every three to five years, you should have your septic tank inspected and pumped by a professional. If you have a bigger home (with more than three bedrooms) and you tend to use a lot of water, you should try to get it pumped at least once every three years. An checkup of a septic system might cost anything from $100 to $900. Your septic inspector will do a visual inspection of the system.

  • Initial inspection costs between $250 and $500
  • Annual inspection costs between $100 and $150
  • And camera inspection costs between $250 and $900.

Use Household Water Efficiently

A toilet that leaks or runs continuously might waste as much as 200 gallons of water per day, although the average family consumes just 70 gallons of water. Take, for example, high-efficiency toilets, which consume 1.6 gallons or less of water every flush or less. The use of new, high-efficiency washing machines and showerheads can also help to reduce water waste, which will relieve the load on your septic system.

Properly Dispose of Your Waste

Your septic system is responsible for disposing of everything that goes down your drains and toilets.

One easy rule of thumb is to never flush anything down the toilet other than human waste and toilet paper, unless it is absolutely necessary. That implies you should never flush the following items down the toilet or drop them down the sink drain:

  • Cooking grease or oil, baby wipes or wet wipes, dental floss, diapers, feminine hygiene products, cigarettes, cat litter, and paper towels are all examples of items that fall into this category.

Maintain Your Drainfield

The drainfield of your septic system is a component of the system that eliminates waste from the septic’s liquid. You should take steps to keep it in good condition, such as:

  • Never park or drive your vehicle on your drainfield. Don’t ever put trees near your drainage system. Maintaining a safe distance between your drainfield and roof drains, sump pumps, and other drainage equipment
Get in Touch With Septic Tank Installers Near You

A septic tank or septic pump tank can range in price from $350 to $14,000, depending on the material used and the size of the tank. In most home situations, you won’t have to spend more than $3,000 on the tank’s actual construction. The majority of big, high-priced units are intended for use in apartment buildings or as part of a communal sewage system.

Concrete Septic Tank Cost

Concrete tanks range in price from $700 to $2,000. The total cost of installation ranges from $2,300 to $6,500. They’re one of the most often seen forms of installation. Despite the fact that they are vulnerable to cracking and separation, they are often resilient for several decades. It’s critical to have it carefully inspected on a regular basis for cracks and runoff, among other things. Inspections and frequent cleanings will assist to extend its useful life. Your professional can tell you how frequently you should get it inspected, but it’s normally every one to three years.

Plastic and Poly Septic Tank Prices

Septic tanks made of plastic range in price from $500 to $2,500 on average, not counting installation costs. Plastic is a long-lasting, lightweight, and reasonably priced building material. They do not break as easily as concrete and do not rust. Because of their small weight, plastics are more susceptible to harm during the installation process.

Fiberglass Septic Tank Prices

Fiberglass septic tanks are typically priced between $1,200 and $2,000, not including installation. Fiberglass does not split or rust readily, but it is prone to damage during the installation process, much like plastic. However, because of its lighter weight, it is more prone to structural damage, and the tanks themselves can move in the soil.


It’s unlikely that you’ll ever see a new steel tank constructed. They will rust or corrode with time, no matter how well-made they are at the time. As a result, they are not permitted by many municipal construction rules, and you will only encounter them in existing installations. Steel is not a long-lasting material in the earth, and it is the least preferred.

Labor Costs to Install a Septic System

The cost of labor accounts for 50 percent to 70 percent of your overall expenses. Labor is typically more expensive than the tank itself in a normal installation, making it the most expensive option. For example, while the size required for a 3 to 4-bedroom home may cost between $600 and $1,100, the labor to install it might cost anywhere between $1,500 and $4,000.

Compare Quotes From Local Pros

Here is a breakdown of how much septic tanks cost in different parts of the country. Massachusetts:$9,700 California:$4,500 Florida:$5,300 Texas:$8,000 $5,600 in New York City Colorado:$7,800 Idaho:$10,000

DIY vs. Hire a Septic System Pro

The installation of a septic system is a time-consuming operation. An incorrectly fitted unit can result in water contamination, structural damage to the property, and the need for costly repairs.

In addition, an unpermitted installation might make it harder to sell and insure a property when it is completed. Make a point of interviewing at least three pros before making a final decision. Contact a septic tank installation in your area now for a free quote on your job.


A septic tank has an average lifespan of 20 to 30 years, however it may live anywhere from 14 to 40 years, depending on the following factors:

  • What it is made of is a mystery. Concrete tends to require more care, but commercial-grade fiberglass and plastic are known to survive for decades in most environments. It’s amazing how well you’ve kept it up. Every one to three years, have your system inspected and pumped out
  • Every three to five years, have it pumped out. It will depend on whether or not it gets vehicle traffic over the leach field. Driving over the leach field compresses it, which increases the likelihood of it failing. The soil’s chemical makeup is important. The length of time it may endure varies depending on the soil type and depth.

What are the signs I need a new septic tank?

There are a few indicators that it is time to replace your septic tank. These are some examples: If you smell sewage, you may have a solid waste problem in your septic tank that has to be dealt with immediately. Standing water: If there is no clear explanation for standing water, such as a significant rainstorm, it is possible that you have an oversaturated drain field, a damaged pipe, or a faulty septic system. A clogged septic tank will cause pipes to drain more slowly than they would otherwise be.

Construction on your home or the addition of more occupants will have an impact on your septic system.

pollution of nearby water: A septic tank leak can result in wastewater contamination, which can deposit nitrate, nitrite, or coliform bacteria in water sources around your property as a result of the leak.

Old age: If your septic system has reached the end of its useful life, it is time to replace it.

Does homeowners insurance cover septic systems?

Many unforeseen and abrupt repairs to septic tanks are covered by homeowners’ insurance policies. They do not, however, often cover harm caused by a failure to perform routine maintenance. Make certain that you are pumping and cleaning it on a yearly basis.

How much do septic system repairs cost?

Many unexpected and abrupt septic tank problems are covered by homeowner’s insurance. They do not, however, often cover damage caused by a failure to maintain the vehicle. Every year, check to see that it has been pumped and cleaned out.

  • Tank Pumps cost between $800 and $1,500. A septic tank that is placed below the drain field may necessitate the installation of a pump to transport wastewater to the drain field. Pumping costs between $300 and $600 per year. Pumping is required to remove solid waste from even a perfectly functioning system every two or three years, even if it is in good working order. Tank Lids cost between $100 and $300 to purchase and install. If you purchase the lid and attach it yourself, it will cost you between $50 and $150
  • Tank Lid Risers range in price from $300 to $1,000. Deeply submerged tanks can have their lids raised to the surface by using these devices.
Still Have Questions About Septic Tanks?

Leave a Comment

Your email address will not be published. Required fields are marked *