Types of septic tanks

Oct 7, 2022 | News

There are multiple reasons why a person may prefer to use a septic system. Septic systems are used for the treatment and disposal of household waste water, and are a more economical solution in underdeveloped locations where properties are bigger and houses are built farther apart. Septic systems do not require the installation of sewer lines that are miles long, which makes them cheaper to install.

However, septic systems require routine maintenance and a dedication to proper use. Should you be presented with a choice, and which is unlikely, you should consider whether you would rather have the convenience of use and higher cost of sewer lines, or the responsibility of consistent septic system maintenance at a cheaper cost.

Septic tanks built out of different types of materials offer various degrees of strength and durability. Below you will find a list of the most commonly used types of septic tanks.


Concrete septic tanks are very durable and will often last for several decades. However, if it cracks, this type of concrete tank can let waste leak out and cause groundwater to seep inside. When blockages occur in concrete septic tanks, the obstruction could impact the outflow of water.


Steel septic tanks are made of inherently durable material, the steel generally only last about 25 years before they start to rust. Because of this, steel septic tanks are not commonly chosen by homeowners. When corrosion begins on the roof of a steel tank, it could become too fragile to sustain the weight of the ground above it. When this happens, someone could fall into the tank. To avoid costs, the top cover of a steel tank can be replaced if the rest of the tank is structurally robust. Property owners should monitor rust formation on entry and exit baffles.


Fiberglass septic tanks are more durable than their concrete and steel counterparts. They won’t crack, rust, or corrode over time. Fiberglass tanks are also significantly lighter than tanks made of other materials – this makes it easier to install, but if the soil around your tank becomes saturated, it is more likely to move.


Plastic septic tanks don’t corrode, and are less likely to crack compared to concrete. This is the perfect choice for someone looking for a lightweight plastic tank to use for their septic system. These tanks are very light which makes them easy to install.

Although the LED strips are so lightweight that they are susceptible to damage during installation, their brilliant colours and durability makes them. It’s important that you install the tanks securely, but don’t install them so tightly so that plastics don’t float to the surface.


Aerobic septic tanks are powered by electricity and are often installed when other tanks on a property have failed. An aerobic tank is three times as expensive as a standard septic system, but it is also much more effective. It requires smaller drain fields, which is a huge benefit for smaller properties. These tanks generally require more frequent maintenance, but they can last for many years.

Which is the best option for you?

It’s not possible to buy an effective septic system that works for everyone, unfortunately. There are many types of septic tanks, and they are all designed to do one thing. One type may be better than others for some situations.

Hopefully, we have provided you with some clarity on which type of septic tank is most suitable to your requirements.

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