What is the average size of a septic tank?
- Septic Tank Design and Structure A quality septic tank is manufactured with concrete, fiberglass and steel rebar, is located underground, and ranges in size from 500 gallons for small septic systems to thousands of gallons for larger systems. The most common septic tank size range is 1,000 to 1,500 gallons for a typical residential septic system.
What size pipe goes into septic tank?
Four-inch pipe is standard, and it should extend far enough under the house to connect with the main soil stack, which is a 3-inch pipe that extends vertically past the main bathroom and through the roof.
What is outlet in septic tank?
The septic tank outlet tee blocks floating scum and sewage from flowing out of the tank where it would rapidly clog the drain field and effluent piping.
How deep is the septic tank outlet pipe?
After the solids settle out, effluent leaves the septic tank through the outlet pipe and flows to the drain field. The outlet pipe should be approximately 3 inches below the inlet pipe.
What are the dimension of a 750 gallon septic tank?
750 Gallon Septic Tank – Single Compartment. 60”D x 51”H x 92”L.
What size is residential sewer pipe?
Sewer drains from laundry sinks or washing machines are 2 inches in diameter and those from sinks in the kitchen, bathroom or powder room generally use a 1.5-inch pipe. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches.
Which pipe is best for septic tank?
The septic tank should be positioned at least 50 feet from the house proper. ABS or PVC plastic or cast iron pipe can be used to connect the tank to the house drainage system. [We do not recommend using clay pipe nor “orangeburg” pipe.]
What are the dimensions of a septic tank?
A typical residential septic tank is usually about 4.5 feet wide x 8.0 feet long x 6 feet tall. Your septic tank may be a different size however. Best practice is to find and measure your septic tank for accurate calculations.
Where is the outlet baffle in septic tank?
Septic baffles are located at the junctions where pipes enter and exit the tank. The one at the inlet pipe is called the inlet baffle, and the one at the outlet is called the outlet baffle.
How do you seal a septic tank outlet?
The tar sealant can be used to fill the void between the concrete and pipe. Use a trowel to press the sealant into the void. If the rubber gasket is molded into the tank for the pipe, tighten it up.
How far is the distribution box from septic tank?
The D-box is normally not very deep, often between 6″ and two feet to the top of the box. You may also see a pattern of parallel depressions, typically about 5 feet apart, that mark the individual drainfield leach lines. The D-box will at or near end of the drainfield area that is closest to the septic tank.
How far down is septic tank lid?
Often, septic tank lids are at ground level. In most cases, they have buried anywhere from four inches to four feet underground.
How deep should a septic tank be in the ground?
The general rule of thumb is that most septic tanks can be buried anywhere from four inches to four feet underground.
How often should a 750 gallon septic tank be pumped?
It is recommended that you pump the 750 gallon tank every year and a half. You can stretch it to once every two and a half years if your tank holds 1000 gallons. You need to pump once a year with a 1000-gallon tank if you double your household size.
What is the smallest size septic tank?
If you’re looking to install a septic system, the smallest tank size you’re likely to find is 750-gallon, which will accommodate one to two bedrooms. You can also opt for a 1,000-gallon system, which will handle two to four bedrooms.
Underground
Drainage Systems (Septic Tanks) (larger sizes available by special order) 300-gallon drum (pump-tank) 500-gallon drum (pump- tank) 32″ W x 6’8″ L5’8″ W x 4’3″ L 5’9″ Tall5’9″ Tall32″ W x 6’8″ L5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall5’8″ Tall Inlet: 59″Outlet: 56″Inlet: 49″Outlet: 46″Inlet: 59″Outlet: 56″ Tank with a capacity of 1000 gallons 750-gallon drum (pump- tank) 5’8″ W x 8’8″ L6’8″ W x 5’7″ L5’7″ Tall, 9,750 lbs.5’4″ Tall, 9,750 lbs.5’4″ Tall, 9,750 lbs.
Flow rate at inlet 49″ flow rate at outlet 46″ Outlet: 50″ x 53″ x 53″ x 50″ Tank Capacity: 1250 gallons Tank Capacity: 1250 gallons 6’8″ W x 9’4″ L6’8″ W x 7’5″ L 5’4″ Tall, 12,000 lbs.5’9″ Tall, 11,000 lbs.6’8″ W x 7’5″ L 6’8″ W x 7’5″ L 6’8″ W x 7’5″ L 6’8″ W x 7’5″ L 6’8″ W x 7’5″ L Intolerances: 53″ and 50″ 57.5″ incoming; 54″ incoming; Tank with a capacity of 1750 gallons and three compartments 1000-500-250 gal., 6’8″ W x 12’10” L, 5’4″ tall, 15,600 lbs.
(the third component is a pump) the chamber) (inlet: 53″outlet: 50″chamber) 1500-gallon tank with three compartments 12,000 lbs.(3rd component is a pump) 5’8″ W x 12’6″ L825-425-250 gal.
52″ inlet x 48″ outlet x 52″ chamber) Tank with a capacity of 2000 gallons and three compartments 6’8″ W x 11’5″ L, 1250 gallons, 750 gallons, 250 gallons, 5’9″ tall, 15,000 lbs.
- chamber) (inlet: 59″outlet: 56″chamber) Tank Capacity: 2250 gallons Tank Capacity: 2500 gallons 6’8″ W x 13’6″ L6’8″ W x 13’6″ L5’9″ Tall, 16,500 lbs.
- 5’10” tall and weighing 17,500 lbs.
- Adventex Treatment Systems are manufactured by Orenco.
- Ecoflo Coco Filter System from Premier Tech (Manhole Risers are made by EZ-Rise.
- 30″ diameter with a height of 12″ Tuftite is available in two sizes: 20″ and 24″ in diameter and 6″ and 12″ in height.
- Concrete dimensions: 23.75″ ID x 28.5″ OD in three different heights: 8, 10, and 12 inches
Concrete Septic Tanks Are Probably The Best Option — Build With a Bang
Concrete Septic Tank with a Capacity of 1000 Gallon When it comes to septic systems, whether you’re in the market for a new system or just need a replacement tank, you’ve arrived to the perfect location. As part of our recent investigation into different types of septic systems that are available for your house, we decided that it would be a good idea to also investigate the many types of septic tanks now available on the market.
The following are the three most common types of septic tanks that are easily accessible for installation:
When constructed properly and maintained on a regular basis, the majority of concrete septic tanks may endure for up to 40 years. No matter which option you choose, keep in mind that a home’s septic system should be cleaned, examined for leaks, and professionally maintained every 3-6 months in order to keep it healthy and running correctly for the homeowner. Waste flow, home size, square footage, number of bedrooms, number of bathrooms, and a few other factors are taken into consideration in septic tank size recommendations and charts.
- Septic tanks are available in a variety of sizes, and you can even obtain tanks that are smaller than 1000 gallons; however, we recommend that you go with a tank that is at least 1000 square feet in size.
- Consult with a licensed expert before purchasing or installing any equipment if you’re going to install a new septic tank or septic system for the first time.
- ” A few of states are now requiring 1000 gallon tanks as the minimum size requirement.
- The popularity of the concrete septic tank can be attributed to its strength, weight, and longevity.
Check out these 6 septic systems available for your home.
Nowadays, most concrete septic tanks are sold with a two compartment design, as opposed to the earlier style one compartment tank that was more common previously. Two compartment tanks tend to perform a better job of filtering and separating waste than one compartment tanks, which is why septic experts advocate them over a single compartment tank. All compartments are constructed with access for cleaning and pumping, regardless of the number of compartments in the system. Because it can readily handle most 0-3 bedroom dwellings, a 1000 gallon septic tank is the standard size for domestic applications.
Heavy Duty Options
Many tanks are also available in “high duty” configurations, which generally have a reinforced top and bottom. Purchasing the heavy-duty version may be a wise decision in the case that a vehicle, agricultural equipment, or other large piece of heavy machinery passes over the tank area.
Installation Requirements
Because of the size and weight of concrete septic tanks, they must be installed by a qualified specialist. These tanks are constructed of the hardest materials available, and while they are extremely durable, their installation necessitates the use of enormous, heavy machinery. If the intended or present site of your concrete septic tank does not allow for heavy machinery access, you may want to investigate a fiberglass or plastic (polyethylene) tank.
Due to the fact that the majority of concrete tanks are precast, their sizes, weights, and dimensions are all different. However, keep in mind that all of these specs are approximations and are subject to change depending on state and local regulations.
Lifespan and Durability
The method by which the concrete septic tank was constructed will have an impact on its long-term function. High-quality concrete, adequate water sealing, and the use of structural steel goods such as mesh and rebar will provide additional support, strength, and structural integrity to the structure. Keep in mind that concrete septic tanks are more prone to cracking and leaking than their plastic and fiberglass equivalents when exposed to exceptionally cold temperatures and pressures. Most concrete septic tanks have a lifespan of up to 40 years if they are constructed properly and serviced on a regular basis.
1000 Gallon Concrete Septic Tank
Septic tanks of 1000 gallon capacity or larger are the most typical size for household usage, as they can readily fit most 0-3 bedroom dwellings. Size Weight: The weight of each concrete tank is different. Some of the most common 1000 gallon concrete precast tanks are around 5′ 1″ X 8′ 2″ X 5′ 8″ in size and weigh almost 9,000 lbs. Others are approximately 5′ 1″ X 8′ 2″ X 5′ 8″ in size and weigh almost 9,000 lbs. Here are some examples of Jensen Precast projects completed in various cities around the United States.
1250 Gallon Concrete Septic Tank
Generally speaking, a 1250 gallon tank is a good choice for mid-size homes with 3-4 bedrooms. Size and weight: The sizes and weights of all concrete tanks are different. 1250 gallon concrete precast tanks are typically 5′ 9″ x 8′ 6″ x 5’8″ in size, with some of the more common models being 5′ 9″ x 8′ 6″ and others measuring 5′ 8″. The typical weight of a 1250 gallon concrete tank is 11,000 lbs, however this might vary depending on the distributor. Approximately 11 1/2 feet in depth, however this varies according on the distributor, state, and local statutes.
1500 Gallon Concrete Septic Tank
Generally speaking, a 1500-gallon tank is the most popular size for large homes with five or more bedrooms. Size and weight: The sizes and weights of all concrete tanks are different. The dimensions of some of the most common 1500 gallon concrete precast tanks are around 6′ x 10′ 9″ x 5′ 5″ in length and width. The typical weight of a 1500 gallon concrete tank is 12,000 lbs, which is rather heavy. Approximately 12 feet in depth, however this varies according on the distributor, state, and local statutes.
Inlet Baffles
When installing a septic tank, an inlet baffle should be put on the inlet part closest to the point at which the sewer tank joins from the house structure to the tank.
Due to the fact that it prevents scum and oils from blocking the entrance pipe, the inlet baffle is critical to the overall health and effectiveness of the septic system. The intake baffle is a bottle neck that is especially designed to do the following:
- In order to prevent the breakdown process from being disrupted, it is necessary to slow the effluent entering the septic tank. A fast rate of inflow of effluent might cause problems by mistakenly combining the settled solid waste with oils, scum, and effluent. Make sure no sewage gases are allowed to enter the sewer line. These gases have the potential to infiltrate back into a home or structure, generating a foul odor.
Outlet Baffles
Every septic tank should be equipped with an exit baffle that is connected to the discharge line. The outlet baffle functions as a bottle neck in the same way as the inlet baffle, but in the opposite direction. It is meant to:
- Preserving the septic tank by keeping scum, oils, and solid waste contained inside
- It is necessary to prevent the discharge of waste items other than wastewater into the output pipe, drain field, and leach field.
All effluent from the septic tank must be clear of solid waste before it may be discharged. Other than that, the solids and oils will pollute the drain field/leach field and result in backups and pollutants entering the surrounding environment. Ensure that your baffles are correctly built and that they are not in need of repair by consulting with a licensed septic technician before doing anything else. Septic tanks made of fiberglass or polyethylene (polyethelyene) are also a suitable option, especially if your location has specialized environmental requirements.
Mobility
In contrast to concrete septic tanks, which normally need a vehicle equipped with a crane and boom, fiberglass and polyethylene septic tanks are quite simple to transport. Therefore, fiberglass and plastic tanks are frequently employed in places where concrete septic tank delivery vehicles are unable to reach the tanks. The majority of fiberglass and plastic septic tanks weigh roughly 300 pounds or more, however concrete septic tanks can weigh up to 20-30 times as much.
Cost Effectiveness
If you’re seeking for a less expensive alternative to concrete, fiberglass and polyethylene (polyethylene) are excellent choices. The majority of fiberglass and plastic septic tanks are thousands of dollars less expensive than concrete septic systems.
Durability
When compared to a concrete septic tank, both plastic and fiberglass septic tanks have a lower likelihood of breaking. Furthermore, because fiberglass and plastic are nonporous materials, there is typically no problem with tree or bush roots growing into the tank and generating leaks as a result of root damage. Having said that, due to the tank’s smaller profile and lighter material composition, caution must be used during installation because heavy gear might easily harm it. Tanks made of fiberglass or plastic can be destroyed in the same way as concrete tanks can if too much weight is placed on the surface above them.
Despite the fact that plastic and fiberglass tanks are quite resilient, they can nonetheless leak under specific circumstances.
The size of the lot, the position of the tank, the amount of ground water, and the weather can all influence the selection.
Float
Plastic and fiberglass have a number of advantages, but they can also be troublesome. Yes, the lightweight character of these materials makes them perfect for installation, but same lightweight nature also results in a high level of buoyancy in the final product. It is possible that during a storm, a plastic or fiberglass tank can get dislodged from its couplings, causing considerable damage to the septic system and the homeowner’s property, with repair costs in the hundreds of dollars. A simple solution is to place a concrete slab on top of the tank to help weigh it down.
If you reside in an area with a high groundwater table, consult with a specialist to ensure that the higher water table will not cause harm to your fiberglass or plastic tank.
Septic Tanks
Listed below is a list of the septic tanks, chlorine contact tanks, and siphon dose tank packages thatCamden Supplyoffers, along with detailed descriptions of their features and specifications. Please call Camden Supply and chat with one of our staff if you require further information on a certain product.
Single Compartment Septic Tanks
A one-compartment steel-reinforced concrete septic tank, according to the script. Lower part is cast as a single piece, with no seams that come into touch with effluent or other contaminants. Specifications:
- Overall height is 56 inches
- Overall length is 79 inches
- Overall width is 48 inches
- Height to center line of inlet is 48 inches
- Height to center line of outflow is 45 inches
- Weight is 5,000 pounds.
600 Gallon Single Septic Tank
Specifications:
- Overall height is 62 inches
- Overall length is 79 inches
- Overall width is 48 inches
- Height to center line of inlet is 52 inches
- Height to center line of outflow is 49 inches
- Weight is 5,000 pounds.
1000 Gallon Single Septic Tank
Septic tank with a single compartment made of steel reinforced concrete (SRC). Lower part is cast as a single piece, with no seams that come into touch with effluent or other contaminants. Specifications:
- Overall height is 60 inches
- Overall length is 96 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 8,000 pounds.
1250 Gallon Single Septic Tank
A one-compartment steel-reinforced concrete septic tank with the lower portion cast as a single piece so that there are no seams that come into touch with effluent. Specifications:
- Overall height is 60 inches
- Overall length is 117 inches
- Overall width is 68 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 10,400 pounds.
1500 Gallon Single Septic Tank
Specifications:
- Overall height is 60 inches
- Overall length is 150 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 11,700 pounds.
25003500Gallon Single Septic Holding Tanks
Single Septic Holding Tank with a capacity of 2500 gallonsSpecifications:
- Overall height is 68 inches
- Overall length is 144 inches
- Overall width is 78 inches
- Height to center line of intake is 61 inches
- Height to center line of outflow is 61 inches
- Weight is 16,000 pounds.
Single Septic Holding Tank with 35 00 Gallon CapacitySpecifications:
- Overall height is 98 inches
- Overall length is 144 inches
- Overall width is 78 inches
- Height to center line of intake is 91 inches
- Height to center line of exit is 91 inches
- Weight is 20,000 pounds.
Dual Compartment Septic Tanks
Description:Two-compartment tank with solids separator between the first and second compartments, holding 500 gallons and 500 gallons, respectively. Lower part is cast as a single piece, with no seams that come into touch with effluent or other contaminants. Specifications:
- Overall height is 60 inches
- Overall length is 96 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 10,000 pounds.
1250 Gallon Dual Septic Tank
Description:Two-compartment tank with a solids separator between the first and second compartments, holding 625 gallons and 625 gallons. Specifications:
- Overall height is 60 inches
- Overall length is 117 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 10,700 pounds.
1500 Gallon Dual Septic Tank
Description:Two compartment system with a capacity of 1000 gallons in the first compartment and 500 gallons in the second compartment. The dosage pump portion is usually found in the second compartment. Lower part is cast as a single piece, with no seams that come into touch with effluent or other contaminants. Specifications:
- Overall height is 60 inches
- Overall length is 150 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 11,700 pounds.
Triple Compartment Septic Tanks
Description:Three-compartment system with a solids separator between the first and second compartments. Each compartment holds 500 gallons. The dosage pump segment is usually found in the third compartment. Lower part is cast as a single piece, with no seams that come into touch with effluent or other contaminants. Specifications:
- Overall height is 60 inches
- Overall length is 150 inches
- Overall width is 67 inches
- Height to center line of inlet is 52 inches
- Height to center line of exit is 49 inches
- Weight is 12,000 pounds.
Chlorine Contact Tanks
Specifications:
- Overall height is 56 inches
- Overall length is 79 inches
- Overall width is 48 inches
- Height to center line of inlet is 48 inches
- Height to center line of outflow is 45 inches
- Weight is 5,000 pounds.
Siphon Dose Tank Packages
Specifications:
- It measures 56 inches in height, 79 inches in length, 48 inches in width, 48 inches in height from center line of intake, 48 inches in height from center line of outlet, and 5,000 pounds in weight. It is equipped with an indoor alarm and alarm float.
1000 Gallon Siphon Tank Package
Specifications:
- It measures 60 inches in height, 102 inches in length, and 67 inches in width. It measures 52 inches in height from the center line of the inlet and 52 inches in height from the center line of the outlet. It weighs 10,000 pounds. It comes with an indoor alarm and an alarm float.
1250 Gallon Siphon Tank Package
Specifications:
- It measures 60 inches in height, 117 inches in length, and 68 inches in width. It measures 52 inches in height from the center line of the inlet and 52 inches in height from the center line of the outlet. It weighs 10,400 pounds. It comes with an indoor alarm and an alarm float.
1500 Gallon Siphon Tank Package
Specifications:
- Overall height is 60 inches
- Overall length is 150 inches
- Overall width is 67 inches
- Height to center line of intake is 52 inches
- Height to center line of exit is 52 inches
- Weight is 13,000 pounds
- Includes indoor alarm and alarm float
Tank Types Express Septic Service
Septic tanks should be cleaned every 3 to 5 years, depending on the size of the household and how much water is used. When the septic tank is pump out on a regular basis, it will help to reduce the buildup of scum and sludge layers in the tank. Ideally, the scum layer should not be more than 24 inches thick. If the material is deeper than 24 inches, it will flow down the outflow pipe and into the drainfield, plugging up the drainfield and resulting in drainfield failure. In order to get your septic tank cleaned, you must first locate the main compartment2nd compartment lid of the septic tank and remove it.
The position of a septic tank lid and the number of lids on a tank varies depending on the year it was placed and the manufacturer.
If you prefer not to find and excavate the Septic Tank lids yourself, or if you are unsure of where the lids are placed, Express Septic Service may assist you with this task.
We may request an as-built drawing from the County Health Department on your behalf if one is available (NO CHARGE). When looking at an as-built, keep in mind that it will only show the overall placement of the sewage system components, not the actual location of the septic tanks.
Septic Diagrams:
1000 Gallon Septic Tanks: This tank design, which was in use from around 1976 to present, will have one main lid and two smaller baffle covers on either end of the tank, as seen in the diagram below.
Two Compartment
From late 1976 until the present, a septic tank layout of 1125-1200 gallons was erected. It is possible for this tank to have two main 24′′ lids or two main lids and two little baffle lids at both ends of the tank right above the inlet and output baffles, depending on the manufacturer. If there are risers to the surface of the tank, you will be searching for two lids that look like this. If the tank is not risered, you will discover concrete lids with a diameter of 2-24″, as seen in the figure below.
Holding Tank
As an alternative to the traditional on-site sewage system, it is a good option. A holding tank is not the same thing as a septic tank. A holding tank is used to retain household waste and prevents any of its contents from leaking into a drainfield, whereas a septic tank is used to enable waste water to flow into a drain field. Concrete, fiberglass, and polyethylene can all be used to construct holding tanks. Depending on the location, holding tanks can be constructed above or below ground. Holding tanks must be pumped on a regular basis, depending on the amount of water and waste water used, as well as the size of the tank.
In the event that a holding tank is not properly pumped, waste water will back up into the home or spill onto the ground.
Pump Tank
Some homes may be equipped with a pump tank or a pump basin in addition to a septic tank. Typically, pump tanks are located underground near the septic tank; however, depending on the year the system was established, risers to the surface may be present, allowing for simple access to examine and repair the effluent pump for maintenance or if the pump has stopped operating. Before the effluent is pumped to the drainfield region, it is collected in a pump tank or basin from a septic tank or ATU (Alternative Treatment Unit).
It is necessary to configure the control floats such that a certain volume of effluent is discharged to the drainfield.
The pump then works to bring the level of wastewater back down until it reaches that of the off float setting.
When the alarm goes off, there is enough reserve storage in the pump tank to allow the homeowner to consume only a little amount of water until the problem with the system can be resolved and the alert turned off.
Aerobic Treatment Unit (ATU)
In some cases, an alternate treatment system may be used in place of a typical septic tank and gravel trenched drainfield, such as in cases of poor soil drainage, small lot size, or environmental concerns. The majority of alternative treatment systems are comprised of a multi compartmented tank known as an Aerobic Treatment Unit, or ATU for short. The majority of ATUs are divided into three compartments: a “waste” compartment, an aeration chamber, and a clarifying chamber. The trash compartment contains solids used in the pretreatment and liquification of garbage, as well as non-waste incidental products that are flushed down the toilet and into the drain.
- Clearing the effluent further improves its clarity since the leftover particles are allowed to settle in the clarifying chamber.
- These components are intended to kill bacteria and pathogens before the effluent is discharged into the drainfield.
- All of these models have undergone extensive testing before being certified.
- These can range from gravity to pressure distribution to Glendon mounds to sand filters to drip irrigation.
- For any routine operation and maintenance inspections or services, a Health Department Certified Operation and Maintenance Specialist will be required, and some manufacturers may require you to be certified by their firm in order to conduct these services.
- As previously said, it is important to have these sorts of systems monitored on a regular basis and fixed as needed in order to maintain correct performance and to keep your system free of problems.
Restaurant Grease Trap
Almost every food service facility that serves food and washes dishes, including restaurants, cafés, coffee shops, delicatessens and bakeries (among others), will have an interior grease trap located near the sinks to collect grease from the sinks. They are available in sizes ranging from 20 to 50 gallons. Fatty acids, oils, and grease (FOG) are prevented from entering your drain pipe by a grease trap, which is a chambered compartment.
Grease flows into the trap, enabling the grease to solidify and float to the top of the trap while weighted solids fall to the bottom of the trap, allowing the liquid to flow out via the drain pipes and into the septic tank or into the city sewage.
Grease Tank Interceptor Service
A grease interceptor is a huge tank that may be situated outside of the structure on the ground level. They can range in size from a few hundred gallons to several thousand gallons. You will need two tanks if you have an exterior tank. The first tank will be a grease trap (tank), which will hold grease until it is removed. The garbage from the restrooms will be disposed of in a tank that is specifically dedicated for this purpose; if the facility is on sewer, the waste will be disposed of in the city sewage.
In addition to a simple cleaning rooter service utilizing an electric snake, we also provide hydro-jetting, which uses high pressure water to break away hardened grease and keep the drain from backing up.
Title 12. Health
A. The capacity of the tank. Based on the daily design flow, a minimum hydraulic detention duration of 48 hours should be implemented. It is not permitted to have a septic tank capacity of less than 750 gallons. Table 5.2 lists the septic tank capacity that are necessary for residential units at the bare minimum.
| Table 5.2.Septic Tank Capacities for Dwelling Units. | |
| No. of Bedrooms | Approximate Tank Volume in Gallons |
| 1 | 750 |
| 2 | 750 |
| 3 | 900 |
| 4 | 1200 |
| 5 | 1500 |
B. The tank’s physical dimensions. Septic tanks must be rectangular in shape in all three views: plan, cross-section, and longitudinal. The length to liquid depth to breadth ratio should be approximately equal to or more than 2 to 1 to 1 (2:1:1) and less than or equal to 3 to 1 to 1 (3:1:1), unless otherwise specified (3:1:1). The liquid depth must never be less than four feet or higher than eight feet in any circumstance. A minimum of one foot of free board must be given on each side. The tank’s inlet and outflow structures must be positioned parallel to the tank’s longitudinal axis.
| Table 5.3.Typical Septic Tank Dimensions in Feet. | ||||
| Approximate Gallons | Length | Width | Liquid Depth | Freeboard |
| 750 | 7 | 3.5 | 4 | 1 |
| 900 | 8 | 4 | 4 | 1 |
| 1200 | 9 | 4.5 | 4 | 1 |
| 1500 | 9.5 | 5 | 4.7 | 1 |
C. The structure of the inlet and outflow. 1. A general statement. The inlet and outlet structures are intended to perform the function of a baffle. In order to accommodate the tank, the invert of the inlet structure must be larger than one inch but less than two inches higher than the invert of the outflow structure while both structures are in use together. Six to eight inches below, and eight to ten inches above, the typical liquid level, respectively, must be the length of the intake structure.
- The inlet and outlet structures must have an open area that is not less than four inches by four inches in cross-section or four inches in diameter, whichever is greater.
- All materials used in the construction of inlet and outlet structures must be resistant to chemical and electrolytic corrosion over an extended period of time.
- D.
- All septic tanks must be waterproof and equipped with a watertight top in order to function properly.
- When the septic tank has more than 30 inches of soil cover, an access manhole must be brought to within 18 inches of the ground surface and be equipped with a tight-fitting cover to prevent the septic tank from overflowing.
- E.
- Septic tanks must be designed and constructed by the contractor or manufacturer to resist the estimated lateral and bearing loads to which they will be subjected over the course of their operation.
- F.
- The tank must be positioned on a flat surface.
Whenever excavation is necessary, the hole must be large enough to accommodate the tank’s installation. Septic tank excavations must be backfilled in stages with appropriate tamping to prevent the soil from settling. There must be no huge stones or debris present in the backfill material.
Where is Septic Tank Outlet?
| Author:Septic Tank Yank (CO)ruraldiy,We have a plugged up septic tank and want to put in a cleanout for the pipe to the field from the septic tank.If your septic tank is “plugged up”, installing a cleanout in the effluent pipeline will not solve your problem.The solution to a “plugged up” septic tank is to have the contents of the tank removed by a septic tank pumper.How deep from the top would I expect to find the output drain?If the tank is a manufactured precast concrete septic tank, the top of the effluent outlet pipeline should be 10 or 12 inches below the top of the tank wall.Typically, the tank outlet is on the opposite wall from the tank inlet.Before you install a cleanout in the effluent pipeline, think about how effective this cleanout will be in solving the problem causing the failure of your septic system.In my view there is no need for a cleanout in the effluent pipeline.If the leach field is totally clogged, cleaning the distribution pipes in the leach field will not cause the leach field to perform properly again.My advice to you is to consider modifying your system to the standards that are defined in the following response to an inquiry posted on the Plbg.com Discussion Forum by a fellow self-named “Dumbdad”.Author: Septic Tank YankDumbdad, sure sounds to me like the septic man is right. If you decide to have the leach field replaced, consider installing 2-half sized leach fields equipped with a 4-inch, NDS brand diversion valve. Cover the valve riser with a 10-inch round irrigation valve box to allow for easy access. The top of the box is set at the final grade elevation. The valve will allow the alternation of flow to the fields. Use half the field for 1-year while the other half rests. Turn the valve annually on the 4th of July, SEWAGE INDEPENDENCE DAY. Celebrate your independence of the sewer grid, and remember that with this independence comes the responsibility of a sewage treatment system operator.I recommend the use of plastic leach field chambers such as the ADS Bio-Diffuser, or Infiltrator brand. Cover each chamber leach field with a 4-foot wide sheet of geotextile fabric (landscaping fabric). The geotextile will prevent the migration of silt into the void under the chambers. The fabric also acts as a wick, wicking by capillary attraction, the effluent up over the chamber units and then into the soil.Install 4-inch monitoring and ventilation ports to the ground surface on each end of each field. The 4-PVC risers are covered with plastic 6-inch round irrigation valve boxes. The tops of the irrigation valve boxes are set at the final grade elevation. The boxes will allow easy location, easy access, and you can run the lawn mower right over them. Typically the covers of the boxes are green.The tops of the in-use field monitoring ports are fitted with 4-inch female threaded adapters, and threaded plugs to prevent sewer gas odors from emanating into the yard. The tops of the resting field ventilation ports are fitted with a 4-inch female adapters, and plastic drain grates.The ventilation ports will allow atmospheric oxygen to enter the leach field, and this will create an aerobic condition in the resting leach field. The oxygen will oxidize the Ferric sulfide (that black slimy crap), a major component of the clogging mat. Also, the aerobic condition will allow the aerobic microbes, present in the surrounding soil, to migrate to the clogging mat and consume the organic matter constituent of the clogging mat, and consume the dead bodies of all their anaerobic microbial cousins. Exchange the solid threaded plugs with the drain grates when the valve is turned on SEWAGE INDEPENDENCE DAY.While you are involved with the major renovation of your septic system, I recommend that 20-inch plastic risers be installed over the inlet manhole, and the outlet manhole of the septic tank. The covers of the risers should be at the final grade elevation to allow easy access to the tank. Let’s face it, if you must excavate the soil over the septic tank manhole with a shovel, chances are that this chore will be avoided. I use Tuf-Tite brand risers.I also recommend that the outlet tee of the tank be fitted with a septic tank effluent filter. The brand that I use is manufactured by SIM/TECH (the big bottlebrush type), although there are several other high quality filters on the market.The filter will reduce the organic matter in the effluent from flowing into the leach field. Clean the filter annually on SEWAGE INDEPENDENCE DAY.Another chore that should be performed annually is the measurement of the sludge accumulation in the primary chamber of the septic tank. The sludge can be measured with a “SLUDGE JUDGE.” Do an Internet search to obtain this neat device. I recommend the implementation of the “1/3 RULE” of sludge removal. When the level of the sludge is 1/3 the total liquid depth of the septic tank, it is time to remove it.The final chore to be performed on SEWAGE INDEPENDENCE DAY is to record all of the maintenance performed on the system in a maintenance log. I prepare a SEWERS CAN BE BEAUTIFUL operation manual for each of the septic systems that I install for my clients. The manual contains a description of the system design, photos of the system components, an as-built plan, a description of the required maintenance procedures, a copy of the permit, and the maintenance log. The manual becomes an excellent sales tool when the time comes to sell the home. The manual answers all questions a potential buyer may have regarding the performance of the septic system, and will allay the fears typically encountered when purchasing a home served by a septic system.Well Dumbdad, I had better end this lengthy diatribe. If all soil absorption type septic systems were designed and constructed to the above standards, then there would be far fewer failed septic systems. Maintenance is the key to successful septic systems. However, if the required maintenance is difficult, or impossible, then chances are it will not be performed. If you would like photos of my typical standard system, send me your e-mail address. My address [email protected] Aldrich (Septic Tank Yank)Septic System ConsultantTimnath, Colorado |
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