Which Septic Tank Is Better, Concrete Or Fiberglass? (Best solution)

While concrete is known for its durability, fiberglass septic tanks are even more durable. Once buried, fiberglass tanks become completely inert. Unlike concrete, it won’t degrade, rust, or weaken. Fiberglass septic tanks also require less maintenance than concrete septic tanks do.

  • Fiberglass septic tanks are a more economical choice than concrete tanks. Over time, you will spend less on the tank, installation, and maintenance. This is especially true for medium to large capacity systems. Fiberglass water tanks are also a more economical solution.

What is best material for septic tank?

The best choice is a precast concrete septic tank. Precast septic tanks hold many advantages over plastic, steel, or fiberglass tanks. This is why so many cities and towns actually require the use of concrete septic tanks.

Is a plastic septic tank better than concrete?

Plastic septic tanks are watertight and are immune to water-based corrosion. They are also rust-resistant. Plastic tanks are less prone to cracking since plastic is flexible, and thus a plastic septic tank does not crack as much as a cement septic tank. Plastic septic tanks are more hygienic than cement tanks.

Are fiberglass septic tanks any good?

If you’re planning to install a new septic tank or replace an existing one, then a fiberglass tank can be a great choice! 1. They weigh less compared to steel and concrete tanks and can be easily installed anywhere. This can be a huge advantage in areas where big trucks or cranes find it difficult to reach.

What kind of septic tank lasts the longest?

Concrete septic tanks have the longest lifespan out of any septic tank material. While they are more expensive and sometimes difficult to install, it is for a good reason. A properly designed and installed concrete septic tank can last for anywhere from 40 years and beyond.

Do concrete septic tanks leak?

The most common problem with concrete septic tanks is that they crack, which causes leaks and problems with soil contamination. If the leaks are only minor, usually they can be repaired and sealed; allowing you to get more life out of your tank.

What is the most expensive septic system?

A mound septic system costs $10,000 to $20,000 to install. It’s the most expensive system to install but often necessary in areas with high water tables, shallow soil depth or shallow bedrock.

Do plastic septic tanks collapse?

Guide to Plastic or Fiberglass Septic Tanks Fiberglass or Plastic Septic Tanks: are very resistant to some of the problems occurring with concrete (cracks) or steel (rust) septic or home made (collapse) septic tanks.

How long do cement septic tanks last?

Inspectapedia estimates that a steel tank baffles will rust out in 15 to 20 years and may collapse if driven over, but a concrete tank will last 40 years or more as long as the wastewater is not acidic. It’s important to consider the life expectancy of a drain-field, too.

How long do poly septic tanks last?

Lifespan: The average lifespan of a plastic septic tank should be 30 to 40 years, given that it is properly maintained. This is far longer than most people live in their home before moving.

What size are concrete septic tanks?

What sizes do concrete septic tanks come in? Standard tank sizes are 1000 gallon, 1250 gallon, and 1500 gallons nationwide.

How often should a septic tank be replaced?

Typical lifespan is in excess of 30 years for GRP, PE and concrete tanks. Assuming optimal conditions of install and use, you could expect the following: Steel septic tanks have a life expectancy of 15 to 20 years.

Can a septic system last forever?

How long does a septic system last? On average, a new septic system will last for 20-30 years. Soil quality – the quality of soil will determine how durable your septic tank is. For instance, acidic groundwater can corrode a concrete septic tank.

How can I make my septic tank last longer?

How to Extend the Life of Your Septic System

  1. Do conduct annual inspections.
  2. Do conduct regular tank cleaning.
  3. Do know where your septic system is.
  4. Do keep septic system maintenance records.
  5. Do reduce water load into your septic system.
  6. Do avoid draining other water sources into your leach field.

Plastic vs Concrete Septic Tanks. Which Should You Get?

We just purchased a property with an older septic tank, which prompted me to do some research on different types of septic tanks. It was not something I had anticipated spending time on. It had a fracture in it, and the vendor was going to replace it. The old concrete tank had been replaced with a new plastic tank, which I was astonished to discover after it had been replaced and we had moved into the house. I’d always assumed they were all composed of concrete until now. That prompted me to inquire: are concrete septic tanks preferable to plastic septic tanks?

However, to break it down fast, concrete septic tanks are excellent for their durability and long life.

Because I am very much a septic tank rookie (if there is such a thing), I wanted to learn everything I could about how to properly manage our system before we installed it.

I’d also like to know if our plastic tank is durable and will survive for several years, or if it will need to be replaced sooner rather than later.

  • Seeing as how I know that I’m not the only one who has concerns about septic tanks, I decided to put all of my results in one place to make it simpler for you to get the answers you’re looking for, as well.
  • As a result, I’ve included some information on pricing as well.
  • You should expect to pay more fees for labor and other materials if you are having your septic system repaired, replaced, or installed entirely from scratch.
  • A concrete or steel tank, if you have an older tank on your property, is most likely the material used.
  • The longer they remain in the ground, the more deterioration they experience.
  • Why?
  • Is it possible to see your youngster running around in the yard and falling into it?!) Septic tank made of old, rotted steel Concrete, fiberglass, or plastic are the most common materials used in contemporary tanks on residential properties.

Here’s what I’ve learnt thus far.

Tanks made of plastic are typically oblong in shape with a lot of ribs on the sides and bottom.

It also aids in their ability to tolerate external pressure such as that exerted by the soil and water.

This is significant because a smooth-sided tank in the ground may be more susceptible to slipping out under certain conditions, such as super-saturated soil from heavy rains, among other things.

Pros: I believe that the weight and expense of a plastic tank are the most significant advantages it has over other solutions.

This implies that you may purchase anything from one of the major home improvement stores and carry it yourself using a truck or trailer to your destination.

The fact that they do have some inherent flex makes them less prone to breaking as a result of ground freezing, which is another advantage of using plastic tanks.

It is more environmentally friendly.

Naturally, this will cause harm to the system and lead you to be unable to use it until the problem is resolved.

Aside from that, even though they are severely ribbed to make them stronger than a smooth-sided tank, they can become warped as a result of the forces of the earth surrounding them.

The typical lifespan of a plastic septic tank should be 30 to 40 years, assuming that it is properly cared for and maintained.

Price per gallon: Of course, prices vary depending on where you live, but it appears that plastic septic tanks cost about $1 per gallon — or about $1,000 for a 1,000-gallon tank and about $1,500 for a 1,500-gallon tank — with a $1,000 tank costing about $1,000 and a 1,500-gallon tank costing about $1,500.

  1. However, I believe that fiberglass outperforms plastic on at least one aspect.
  2. External influences should not have an impact on them.
  3. There aren’t any downsides in this case.
  4. The life expectancy of this product is similar to that of plastic tanks.
  5. In addition, the cost is around $1 per gallon, or approximately $1,000 for a 1,000-gallon tank and approximately $1,500 for a 1,500-gallon tank.
  6. They can either be constructed on-site or pre-cast.
  7. The concrete is then poured into the mold, where it is allowed to set and cure while still in the mold.

A different place makes them, and they are delivered to your location for installation.

Pre-cast firms create molds for concrete tanks and other concrete objects, pour the concrete into the molds, and then store the concrete tanks and other concrete items on site until they are transported to the building site.

Concrete will not corrode, rust, or dissolve under normal conditions.

Additionally, the strength of concrete septic tanks will outperform that of plastic or fiberglass septic tanks.

The huge weight of a concrete tank is a possible disadvantage, which you can read about further below, but it is also a good element since the incredible weight means that they are significantly less likely to shift in the ground as they are being built or installed.

First and foremost, they have the potential to break or split, enabling sewage to spill out (although this is unlikely to occur for many years).

The seller was previously aware that it had cracked at one of the top corners and that he would not be permitted to sell the house until it was replaced.

A concrete septic tank with a capacity of 1,000 gallons weighs approximately 8,000 pounds (or 4 tons).

Longevity: If properly cared for, they should easily endure for 40 years or more.

Cost on average: A concrete septic tank is often less expensive than a plastic or fiberglass septic tank, according to what I’ve learned about the industry.

Septic Tanks Made of Steel Currently, I have not seen any stores that sell steel sewage treatment tanks, although these look to be rather old-fashioned in appearance.

However, the potential drawbacks are significant.

Consider all of the times you have come across a metal can that has been buried in the ground for a long period of time, or that has just been exposed to the weather for a long period of time.

Tanks made of steel not only put people’s lives in danger by allowing sewage to seep into the ground, but a rusted steel lid may easily collapse when someone walks over it, throwing the person into the tank!

This is something to keep in mind if you are purchasing or owning a home that already has a steel tank installed, even though buying a steel tank is almost always out of the question.

Which Type of Septic Tank is Best?

If you plan to be in your house for the long haul, and if large trucks can get to your location easily enough, I think it is worth the extra money for the added peace of mind to have a concrete septic tank.

Finally, for the ultimate in lowest cost and ease of getting the tank yourself, the plastic tanks will fit that bill. Now that you have a new septic tank on the way, here aresome tipsto properly maintain it.

A Short Guide on Fiberglass Septic Tanks (Updated for 2020)

A septic tank is an underground chamber into which wastewater is channeled for basic treatment before being discharged. Typically, these tanks are used to store effluent from household sources, but they are now now being used in businesses and factories to store wastewater that has comparable qualities to that of domestic effluent. Septic tanks are designed such that the liquid flows through the tank while the heavier particles fall to the bottom of the tank. The scum (which is mostly comprised of oil and grease) floats to the surface.

Septic tanks are generally classified into four categories, which are available on the market: Septic tanks made of fiberglass septic tanks made of steel Septic tanks that use aerobic bacteria Septic tanks made of concrete In this blog post, we’ve offered a brief overview of fiberglass tanks and how they work.

What is Fiberglass Septic Tank?

Tanks built of fiberglass, as the name implies, are constructed of fiber or a sort of modified plastic. They are lighter in weight than the other kinds and are resistant to corrosion and breaking when compared to the others. The nicest aspect about these tanks is that they are quite simple to put together. However, there are a few things that you should keep an eye out for while evaluating one: Check for a faulty plastic stopper at the bottom of the tank after you have emptied it to see whether the level of the effluent has dropped too low.

  1. 2.
  2. Observe for signs of abnormally low effluent levels as well as the absence of drain plugs.
  3. A gravel-filled tank is used for this test, and water is pumped into the tank to stimulate groundwater pressures as part of it.
  4. The greater the number, the better!

Fiberglass Septic Tank Cost

the size and quality of the material used to construct the tank are the two most important factors affecting the price of a fiberglass septic tank In the United States, the typical price ranges anywhere between $1600 – $2000. A fiberglass tank can endure for up to twenty to thirty years, depending on the building methods employed, the state of the soil, and the materials used in the production process, among other factors.

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How Does a Fiberglass Septic Tank Work?

Essentially, a septic tank is an underwater sedimentation tank that is used to cleanse wastewater through a process of biological breakdown and drainage. The design of fiberglass tanks is straightforward. It consists of a fiberglass container (often rectangular or spherical in shape) buried underground and sealed against the elements. The tank is connected to the rest of the system by two pipes: an inlet and an outlet. It is the input pipe’s responsibility to collect wastewater in the septic tank, whereas it is the outlet pipe’s responsibility to remove the pre-processed wastewater from the septic tank and disperse it evenly across the soil and watercourses.

The top layer is primarily made up of oil and grease, which floats above the rest of the waste and collects water.

The wastewater and waste particles that make up the intermediate layer are collected here.

Bacteria from wastewater break down the solid waste that accumulates inside the tank. These bacteria also degrade solid waste fast, allowing liquids to separate and drain away more quickly as a result of the rapid decomposition.

Which is Better Concrete or Fiberglass Septic Tank?

Fiberglass tanks are waterproof and corrosion-resistant, making them ideal for storage. Additionally, they are less heavy than concrete septic tanks. Rather than being lightweight and resistant to corrosion, concrete tanks are hefty and susceptible to corrosion. When compared to concrete septic tanks, lightweight septic tanks are more susceptible to damage during the installation process, according to a recent research. Concrete septic tanks are also far more expensive to construct and maintain than fiberglass septic tanks, both in terms of installation and maintenance expenses.

Additionally, if fiberglass tanks are built incorrectly, they will frequently float on the ground’s surface.

The most problematic aspect of concrete septic tanks is that they frequently break when exposed to extremely hot or cold weather.

To summarize, fiberglass tanks are the most cost-effective alternative if you’re seeking for a tank that will meet your needs while still being affordable.

Advantage and Disadvantage of Fiberglass Septic Tanks

If you’re intending to construct a new septic tank or replace an old one, a fiberglass tank may be an excellent option for you. Here are some of the reasons why you should select it over the alternatives: 1.They are less in weight as compared to steel and concrete tanks, and they may be erected almost anyplace. Large trucks and cranes may be unable to access certain regions, which might be a significant benefit in some cases. 2.They are small enough to be transported in a pickup truck. 3.They are extremely strong and long-lasting.

  1. 4.They have a higher resistance to corrosive elements than concrete storage tanks.
  2. The roots of plants find it difficult to enter them, in contrast to the situation with concrete tanks.
  3. Let’s talk about it!
  4. Because these tanks weigh less than concrete tanks, you must take the necessary precautions to ensure that they are properly anchored to the ground before using them.
  5. A fiberglass tank that has been correctly constructed and secured can survive for many years without causing you any concern.

So there you have it, a quick overview of fiberglass septic tanks. Keep in mind to share your ideas in the comments area below! Also, please let us know if there is something crucial that we have overlooked.

  • Septic tanks made of fiberglass
  • Fiberglass tanks for industrial use
  • Fiberglass septic tanks

Which Septic Tank Material Should You Use?

Receive articles, stories, and videos about septic tanks delivered directly to your email! Now is the time to sign up. Septic Tanks and More Receive Notifications Many different types of materials have been utilized to create septic tanks over the course of history. The following materials are most frequently used in the construction of septic tanks: 1. Resin made of polyethylene and polypropylene The use of fiberglass-reinforced plastic is another option. Precast concrete is a third option. Tanks made of precast concrete have traditionally been used for on-site water storage.

The use of tanks made of fiberglass reinforced plastic (FRP) and polyethylene is becoming more popular.


Tanks made of polyethylene/polypropylene “poly” can be rotationally molded in one piece or injection molded in two sections depending on the application. The bending and cracking of certain early poly tanks were a concern both during installation and while in use. Tanks with a ribbed or corrugated construction are more structurally sound than older models. Septic tanks’ structural soundness and watertightness are dependent on the use of high-quality raw materials and the careful attention paid to production procedures.

In the manufacturing of poly tanks, rubber and plastic pipe seals are frequently employed; in addition, access risers are often constructed of the same polymers as the tank itself to provide a seamless aesthetic appearance.

Most local codes have approved poly tanks, and manufacturers specify where and how poly tanks may be used; therefore, when evaluating the use of any tank in onsite systems, it is important to review the strength and other requirements included in the manufacturer’s installation instructions, as well as the manufacturer’s specifications.


  • Installation is simplified by the fact that poly tanks are lighter than concrete, which is advantageous on difficult-to-access sites. No rust or corrosion, and they are resistant to the chemicals and gases found in sewage and soil, allowing them to last for a longer period of time than other materials. Contractors may deliver themselves, eliminating the need for a boom truck or the need to wait for delivery. The design minimizes the number of seams and joints that may leak
  • Economical


  • Because of their low weight, steel tanks are more likely than concrete tanks to float out of the ground in locations with high water tables. Larger capacity are not normally offered
  • Nonetheless, Typically only available in a limited number of different sizes
  • Typically, there is no rating for traffic
  • Have a restricted depth of burying (often 4 feet, but verify with the manufacturer for exact depth)
  • Some brands must have water or wastewater in them at all times
  • Others do not. In order to assure structural integrity, certain installation criteria must be followed.

Fiberglass Reinforced Plastic (FRP)

Some fiberglass tanks are built as a single piece. Others are manufactured in two pieces by the use of an injection molding technique. Structure soundness and watertightness are both dependent on the use of high-quality raw materials and the strict adherence to production standards, as previously indicated. FRP tanks may leak as a consequence of shipping damage, a faulty batch of glue, uneven application of adhesive, or tension imposed on the midseam during installation, however this is not typical.

The assembling procedure must be meticulously carried out to ensure that the joint does not leak or split.

While the glue is curing, the bolts are mostly employed to keep the pieces together while the adhesive cures.

Pipe penetrations and access riser joints, just like with tanks composed of other materials, must be carefully sealed to ensure that they do not leak and cause damage.

If joints are not watertight, the functioning of the tank is significantly diminished owing to the greater danger of water invading the tank. Testing for watertightness in the field is simple and may be accomplished by filling the tank with water (above the seams) and looking for any leaks.


  • The tanks are less heavy than concrete tanks, which might be advantageous in difficult-to-reach locations. They are not susceptible to rust or corrosion, and they are resistant to the chemicals and gases found in sewage and soil. Larger capacity options are available. It is possible to build for a deeper burial and to have a traffic rating


  • Because of their low weight, steel tanks are more likely than concrete tanks to float out of the ground in locations with high water tables. In order to assure structural integrity, certain installation criteria must be followed. When compared to concrete and polyethylene tanks, steel tanks might be less cost-effective. Typically only available in a limited number of different sizes


Precast septic tanks are normally made in two sections, with a seam either at the lid or in the middle of the tank’s body. Blended compounds, such as butyl rubber-based or asphalt-based (bituminous) sealants, are commonly used to seal precast tanks that are made of several pieces. It is possible for a leak to occur at the inlet and outlet pipe penetrations, particularly if the tank or piping settles or moves as a consequence of faulty bedding or installation. Mechanically sealing these connections to the tank is essential to ensure that they are both waterproof and flexible.

  1. Rubber boot seals are particularly attractive since they are flexible and maintain a seal even after backfilling and settling has taken place.
  2. Steel reinforcement is employed in accordance with the tank design to offer additional structural capacity during handling, installation, testing, and operation of the tank, among other things.
  3. The compartment walls are normally cast in one piece with the tank, similar to how the tank is constructed.
  4. When it comes to horizontal joints, preformed flexible joint sealants consisting of butyl rubber or asphalt-based compounds are utilized to seal them.
  5. These connections should be made with cast-in, waterproof, flexible resilient connectors that allow the tank and pipe to move freely without the chance of a leak forming between them.
  6. As with other tank materials, it is critical that the tank be waterproof, and in-field verification at the time of installation may be accomplished quickly and simply using proper techniques.


  • Because of the density of concrete, it has a higher resistance to buoyancy. Installation criteria that are less strict
  • The containers are available in a variety of sizes, including extremely large capacity. It is possible to build for a deeper burial and to have a traffic rating
  • It’s less difficult to modify
  • Economical


  • On sites with restricted access, the weight of the material and the equipment required for placement might be challenging. It is possible for corrosion to occur.

a little about the author Sara Heger, Ph.D., is an engineer, researcher, and lecturer in the Onsite Sewage Treatment Program at the University of Minnesota’s Water Resources Center. She holds a bachelor’s degree in civil engineering and a master’s degree in environmental science. She has presented at several local and national training events on topics such as the design, installation, and administration of septic systems, as well as research in the related field. Her responsibilities include serving as the education chair for the Minnesota Onsite Wastewater Association and the National Onsite Wastewater Recycling Association, as well as serving on the National Science Foundation’s International Committee on Wastewater Treatment Systems.

Send an email to [email protected] if you have any concerns concerning septic system care and operation. Heger will respond as soon as possible.

Fiberglass tank vs Concrete tank

In the long term, fiberglass proves to be significantly more cost-effective. When all of the advantages related with the purchase, installation, maintenance, and durability are taken into consideration, a fiberglass tank is a significantly more cost-effective alternative, particularly for systems with medium to large capacities.


The fibreglass tank becomes fully inert when it has been erected and buried. As a result, it possesses exceptional longevity as well as optimal tightness throughout. When compared to other materials, fibreglass has a number of advantages, including the following:

No deterioration

  • It is fully inert when it has been fitted and buried in the ground. Consequently, it has exceptional durability and optimal tightness throughout the whole surface. Fibreglass has a number of advantages over other materials when compared to them.

No internal or external corrosion

  • Because it has no metal reinforcement, the fibreglass tank is impervious to corrosion. Aside from that, the interior finish’s non-porous smoothness hinders the growth of algae, bacteria or microbes (MIC, microbial induced corrosion).

No structural weakness

  • Fiberglass, in contrast to concrete, is a non-porous material that does not dilate when exposed to heat. In addition, the structural integrity ensures that any potential cracks caused by expansion and contraction over time are avoided entirely. Fiberglass is a durable and monolithic option because of its unibody structure, which means it has no weak points that might lead to a leak.

If you want to understand more about our fiberglass tanks, check see our documentation.


It is not necessary to do any maintenance on the fibreglass tank due to its monohull and impermeable nature. It also does not require any waterproofing coating. As a result, it makes your operations much more convenient.

  • There is no requirement for further monitoring. Irreversible insensitivity to stray electrical currents There will be no seal replacement. There will be no overlay for the duration of the reservoir’s existence
  • Absolute serenity of mind for the foreseeable future


A fibreglass tank is over 30 times lighter than a concrete tank of equivalent size and strength*. Forget about the large cranes and take advantage of the significant savings.

Easy handling

  • Taking advantage of this exceptional lightweight makes transit, installation, and relocation a breeze. Furthermore, the strength and structure of the monocoque fibreglass result in a product that is capable of withstanding even the most adverse installation circumstances. There is no need for on-site assembly.
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  • This exceptional lightweight makes shipping, installation, and relocation much easier. Aside from that, the strength and structure of the monocoque fibreglass result in a product that is capable of withstanding even the most adverse installation circumstances. This product does not require any assembly on-site.


Through the use of the fibreglass tank, it is simple to link complimentary tanks together using the communication vessel idea. Using this capability, you may construct systems with virtually limitless capacity.

  • Standard capacities ranging from 50 m3 to 150 m3 are available. Configurations that are adaptable to the limits of the land
  • Variable configurations
  • Design and production adapted to satisfy the unique requirements of consumers

* Based on the weight of a 60 m3 septic tank as a basis for comparison. A concrete tank weighs 66 320 kg, but a fibreglass tank weighs 2109 kg.

The Difference Between Concrete and Fiberglass Septic Tanks – First Quality Environmental

It’s important to choose the correct type and size of septic tank for your house or company in order to ensure that it will last for many years. Your selection will be influenced by factors such as the location of the structure and the size of the residence. The following are some of the advantages and disadvantages of both fiberglass and concrete septic tanks, according to the septic system servicing specialists at First Quality Environmental in Waimanalo.

Concrete vs. Fiberglass Septic Tanks

Due to the fact that concrete tanks are hefty, long-lasting, and can be made waterproof, they are less likely to be damaged during installation and provide a broad range of siting possibilities for customers. Typically, because of their weight, they do not require any further securing to prevent them from “floating.” Concrete tanks have a number of disadvantages, including a proclivity to break if poor quality concrete is used and regular maintenance is not performed. Cracks can enable groundwater to seep in or garbage to seep out, neither of which is a good outcome.

FiberglassPlastic Tanks

Fiberglass tanks are not susceptible to rusting or breaking over time, and they are impervious to the chemical reactions that occur in a septic system. They are lightweight and simple to install, however caution should be exercised to avoid damaging them during the installation procedure. Inquire with your septic system operator about the cost of a fiberglass tank, which may be less expensive than a concrete tank. Despite the advantages of this form of septic tank, there are some negatives as well.

In regions with high groundwater levels, a plastic tank may “float” to the surface, causing damage to the tank’s pipes and the surrounding environment.

Please let the septic system servicing professionals at First Quality Environmental to assist you in selecting the most appropriate tank for your needs.

Since 1991, they have delivered residential and commercial wastewater treatment systems to residents and businesses around the island of Oahu. To obtain a quotation, call (808) 259-0100, or go to their website for more information about their products and services.

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.

  1. 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.
  2. 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.
  3. 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.
  4. ” A few of states are now requiring 1000 gallon tanks as the minimum size requirement.
  5. 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

Rather of the previous style one compartment tank, most concrete septic tanks sold nowadays are two compartment designs. Consequently, septic experts advocate two compartment tanks over one compartment tanks because they tend to perform a better job of filtering and sorting waste.

All compartments are constructed with access for cleaning and pumping, regardless of the number of compartments in the vehicle. Because it can readily handle most 0-3 bedroom dwellings, a 1000 gallon septic tank is the standard size for household usage.

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.

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

In general, a 1000 gallon septic tank is the most typical size for residential usage since it is large enough to serve most 0-3 bedroom homes.Size and weight: All concrete tank sizes vary. Typical dimensions for 1000 gallon concrete precast tanks are approximately 5′ 1″ x 8′ 2″ x 5′ 8″ and weigh almost 9,000 lbs.Here are some examples from Jensen Precast in various cities across the United States.Excavation Depth:Approximately 9 1/2 feet in depth, which varies by distributor, state and local statutes, and other factors.

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. Baffles at the input and output of the system aid in the separation of solid waste items, oils, and scum from the effluent.

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 therein
  • 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 good option, especially if your area has specific environmental conditions.


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 used in areas where concrete septic tank delivery trucks 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.


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.

As a result, it’s important to contact with a septic installation specialist before making a final decision on a certain material. The size of the lot, the position of the tank, the amount of ground water, and the weather can all influence the selection.


Plastic and fiberglass have a number of advantages, but they can also be problematic. Yes, the lightweight character of both materials is good for installation, however same lightweight nature results in significant buoyancy. 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 a region with high ground water, check out a specialist to make sure that the higher water table won’t harm your fiberglass/plastic tank.

Fiberglass vs concrete septic tanks: find the best for you

If you are considering installing an on-site septic system or a septic tank in your home, it is critical that you explore the many options and understand the pros and disadvantages of each to ensure that you select the tank that best meets your needs. Fiberglass and concrete septic tanks are the two most frequent types of septic tanks. Both serve distinct objectives and each has its own set of perks and drawbacks to consider. Find out which type of septic tank would be the most suitable for your needs.

  1. It is commonly a rectangular or round-shaped fibreglass tank that is buried underground and is completely waterproof.
  2. The intake pipe works to collect the wastewater whereas the output pipe does the reverse and eliminates pre-processed wastewater and distributes it to watercourses and soil.
  3. The first, or top, layer contains the oil and grease that floats above the surface of the water; this is referred to as the scum by some.
  4. The last layer contains larger particles that combine to produce a layer of sludge.
  5. They are quite light in weight and can be quickly and readily put almost anyplace.
  6. Because of their light weight, they can be transported easily in a pickup truck, making transportation simple.

The result is that they can withstand extreme temperature changes and corrosion for many years without becoming damaged. When compared to other types of tanks, it is quite simple to repair any damage that has occurred, and tree roots have a tough time penetrating them, as opposed to concrete tanks.

Disadvantages of fiberglass septic tanks

The danger of local corrosion in a septic tank exists if components of the tank are not made of corrosion-resistant materials. The reason for this is that a fibreglass tank is not constructed in a single piece, resulting in gaps that are susceptible to corrosion. Due to the fact that this sort of tank is handcrafted, it requires a high level of labor, making it more sensitive to mistakes made by human hands. Fiberglass septic tanks are susceptible to damage when soil movements occur as a result of traffic or heavy vehicles passing over the septic tank’s foundation.

See also:  How To Protect Septic Tank During Landscaping? (Correct answer)

Additionally, because the tank is lightweight, it will float on top of the water, as opposed to a concrete septic tank, which will sink to the bottom.


Fiberglass tanks may endure for more than 40 years if they are properly maintained and are not impacted by the gases released by sewage, allowing them to have a longer service life. These tanks are also far less expensive to repair than concrete tanks; however, it is doubtful that you will need to do so.

Average cost

Fibreglass tanks are priced based on the size of the tank they contain, as well as their quality of construction. It is estimated that the typical cost of a fibreglass tank in a three- or four-bedroom home is between $1,500 and $2,000.

Concrete septic tanks

In addition to being a lasting material, concrete septic is typically used on building sites because of its strength. It is possible that investing in the correct septic tank may make your life lot simpler because you will have less repair expenses.

Advantages of concrete septic tanks

The long-term durability of a concrete tank is a significant benefit. Because concrete is a solid material, as opposed to plastic tanks or fiberglass septic tanks, it is extremely long-lasting and reliable in service and maintenance. This also implies that there is a very little chance that the tank will be damaged during the installation process. As an added bonus, this sort of tank is rustproof, unlike a steel septic tank. In order to enhance the durability of the tank and, as a result, save future expenditures, a rustproof septic tank is required.

It will also not collapse during the pumping process because the tank is strong.

This increases their effluent capacity and saves you money by reducing pumping costs.

Disadvantages of concrete septic tanks

Concrete has a few downsides, the most significant of which is that it is more difficult to repair than a plastic septic tank or a fiberglass tank in the event that it is broken. As contrast to fibreglass tanks, which are constructed from many sections, concrete tanks consist of a single large piece of material. Concrete tanks can fracture if they are not properly maintained; this is particularly common in older tanks. Concrete tanks can be repaired if they are properly maintained. The fact that concrete septic tanks are prone to cracking implies that they are at danger of contamination since wastewater can escape via the cracks.

Additionally, concrete septic tanks are more difficult to install than fibreglass or plastic septic tanks since they are heavier and less maneuverable in contrast to the former. As a result, substantial materials are required for installation, raising the overall cost.


Concrete has a few drawbacks, the most significant of which is that it is more difficult to repair than a plastic septic tank or a fiberglass tank in the event that the tank is broken. As contrast to fibreglass tanks, which are constructed from many sections, concrete tanks consist of a single large piece of material. It is more common in older tanks for concrete tanks to crack if the tanks are not properly maintained. The fact that concrete septic tanks are prone to cracking implies that they are at danger of contamination since wastewater can leak out via the cracks.

Therefore, hefty materials are required for installation, raising the overall cost.

Average cost

Several elements, including the size of the concrete tank, will influence the price of the tank. Tanks are available in sizes ranging from 3,000 to 12,000 litres, with costs ranging from $1,200 to $5,000. Which form of septic tank is the most effective? A concrete septic tank is highly suggested since it is less difficult to acquire a license and because they are available in a variety of sizes, making it easier to pick the one that is best for your situation. However, there is no one solution to this issue because the tank you choose will be determined by your requirements.

Septic tank maintenance tips

There are a variety of steps you may do to assist in the maintenance of the health of your septic system. In addition, it is important to be aware if the family is using antibiotics, which might have an influence on the bacteria in the system, and to use septic system cleansers designed for septic systems. Storm water should be diverted away from the dumping location as well, since severe rains might cause the system to malfunction. Ascertaining that you perform a yearly inspection of the tank, as well as checking the depth of the dirt and scum on a regular basis.

Talk to a professional

If you are still unclear about which septic tank is best for your needs, don’t worry; we can connect you with a provider who will be able to assist you. Contact our experienced team by calling 1300 691 912 or by sending an email to our projects team with your specifications. They will connect you with a septic tank professional who will assist you in determining which septic tank is the greatest fit for your needs. Install our seeker app and you’ll have access to hundreds of providers right in your pocket.

Concrete vs Plastic Septic Tanks: Which is Better?

The septic tank on your property is one of the most important components of the whole plumbing system on your property. Septic tanks are designed to safely handle and manage all of the wastewater generated by your property. If your septic tank is not operating properly, you should replace or repair it as soon as possible. It is possible that your septic tank is not operating properly, causing your entire plumbing system to be interrupted. This might result in you placing yourself and your family in risk, as well as causing damage to your home or garden.

There is a good probability that you will be replacing your present septic system with a new one within a few years.

This is due to the fact that the septic tank you select will be used to service your plumbing system in the future.

Septic tanks made of sorplastic.

Plastic and concrete are the two most often used materials in the construction of septic tanks. Knowing their advantages and disadvantages will assist you in selecting the one that best matches your needs and fits inside your budget. Examine the merits and cons of each of these options separately.

Plastic Septic Tanks


  • The purchasing price of plastic septic tanks is less expensive than that of concrete septic tanks
  • Thus, they are more cheap. Plastic septic tanks are simple to install since they are lightweight
  • They take just a small number of people to complete the job and require little time and equipment. As a result, installation costs are reduced. Poly septic tanks are lightweight and versatile, making them ideal for travel. This implies that they may be placed in a variety of locations. Plastic septic tanks are waterproof and impervious to corrosion caused by water-based substances. Additionally, they are rust-resistant. Plastic tanks are less prone to cracking than cement tanks because plastic is more flexible than cement
  • As a result, a plastic septic tank does not break as often as a cement septic tank It is more sanitary to use polyethylene septic tanks than than cement tanks
  • Plastic tanks are delivered fully assembled and ready to be fitted.


  • Plastic tanks are not as durable as concrete and are quickly crushed by the weight of the container. Alternatively, they might be crushed by the weight of thick dirt or by vehicles passing over the areas where they are buried. Plastic tanks are also susceptible to the environment, which means that they might burst or crack as a result of changes in soil vibrations and environmental conditions, among other things. Solid-waste disposal systems made of cement, on the other hand, are far less sensitive to environmental changes. Plastic septic tanks are more susceptible to deterioration than cement septic tanks because they break or wrap more frequently. In comparison to cement septic tanks, plastic tanks require more care to keep them operating properly. Concrete tanks have a longer lifespan than poly septic tanks
  • However, they are less durable. Plastic tanks normally have low effluent levels and will “float” when the water level is greater than usual. This “floating” can cause extensive damage to your plumbing system as well as the septic tank itself. Plastic septic tanks are not approved for use in all states
  • However, in some states they are.

Possibly of interest to you is this article: Should you buy a property with a septic system?

Concrete Septic Tanks


  • Cement septic tanks outlast plastic tanks in terms of durability and, if maintained properly, may survive for a lengthy period of time. In the right circumstances, with regular draining and good maintenance, a cement septic tank can endure up to 40 years or more. Cement septic tanks are resistant to changes in the environment, such as tree roots or shifting soil conditions. Concrete tanks are not adversely affected by the weight that is placed on top of them. Comparing cement septic tanks to plastic septic tanks, cement tanks are far more durable and require little maintenance. Concrete tanks are highly heavy and have high effluent levels
  • Consequently, they are impervious to “floating.”
  • There are no restrictions on using cement tanks in the United States
  • They are permitted in every state.


  • Concrete septic tanks are more expensive to purchase and install than plastic septic tanks, mostly due to the weight of the concrete tanks. Concrete tanks are more difficult to carry and install than plastic tanks due to the fact that they are awkward and more big in comparison. Therefore, the cementseptic tank installation necessitates the use of heavy equipment and requires a significant amount of time. Cement tanks are also more difficult to repair and install than other types of tanks. As your cement tank is broken, it is more difficult to repair it efficiently when compared to plastic tanks. Compared to plastic tanks, cement septic tanks are more prone to corrosion due to the fact that they fracture or corrode as the tanks age, particularly if they are not properly maintained.

Selecting a Septic Tank

For many homeowners in Atlanta, GA, cement is the go-to material because it is permitted in all 50 states in the United States, including Georgia. It has been a long time since cement has been the preferred building material due of its resistance to damage caused by shifting or heaviness. Nonetheless, when it comes to cost, plastic septic tanks are more affordable than concrete tanks. It is recommended that you use a plastic tank when you live in a remote area because cement tanks cannot compete with the ease with which it can be installed and transported.

Septic tanks made of cement are not recommended for use in areas with high acidity in the soil.

Despite the fact that there are several aspects to consider when deciding between a plastic and a cement septic tank, examine your location and scenario and choose the choice that feels best for your property.

For all of your septic tank system requirements, contact The Original Plumber.

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