Choosing Between Concrete and Plastic Septic Tanks

Plastic vs. Concrete Septic Tanks

When it comes to choosing the right septic tank for your property, the decision between a plastic and concrete tank is one that requires careful consideration. Both materials have their advantages and drawbacks, and making the right choice is crucial for the long-term efficiency and durability of your septic system. In this blog, we'll delve into the pros and cons of plastic and concrete septic tanks to help you make an informed decision.

Plastic Septic Tank

Plastic septic tanks have gained popularity in recent years due to their lightweight nature and ease of installation. One of the primary advantages of plastic tanks is their resistance to rust and corrosion. Unlike their concrete counterparts, plastic tanks won't deteriorate over time when exposed to soil moisture. This resistance makes them an appealing choice for areas with high water tables or aggressive soil conditions.

The lightweight nature of plastic tanks changes the installation process. Some say that plastic septic tanks are easier to install; this is true in some manners. Plastic septic tanks are easier to handle since they weigh less, but require more attention and caution when installing. They can collapse easily if backfilled improperly. Plastic tanks are also less prone to cracking during transport and installation, providing an added layer of durability.

Environmentalists often favor plastic tanks because they are made from recyclable materials and have a lower carbon footprint during manufacturing compared to concrete tanks. This eco-friendly aspect may sway environmentally conscious homeowners towards plastic alternatives.

Concrete Septic Tank

Concrete septic tanks, on the other hand, have been a traditional choice for decades, and for good reason. One of the most significant advantages of concrete tanks is their durability and longevity. When properly installed and maintained, a concrete septic tank can last for several decades, outperforming many plastic alternatives.

Concrete tanks also offer better resistance to buoyancy, making them a preferred choice in areas prone to flooding or high groundwater levels. Their robust construction makes them less susceptible to damage from external forces such as tree roots or heavy equipment, providing added peace of mind to homeowners.

Moreover, concrete tanks have a higher capacity for handling wastewater, making them suitable for larger households or commercial properties. They are also less permeable than plastic, reducing the risk of leakage and groundwater contamination.

Choosing Your Septic Tank

Ultimately, the choice between a plastic and concrete septic tank boils down to the specific needs of your property and your preferences. Consider factors such as soil conditions, water tables, installation ease, and long-term maintenance.

If you prioritize ease of installation, resistance to corrosion, and an eco-friendly footprint, a plastic septic tank might be the right fit for you. On the other hand, if durability, longevity, and a higher wastewater capacity are your priorities, a concrete septic tank may be the better choice.


The decision to invest in a plastic or concrete septic tank is a significant one, and there's no one-size-fits-all answer. Take the time to assess your property's unique characteristics and weigh the pros and cons of each material. Consulting with a septic system professional can provide valuable insights tailored to your specific situation. Remember, a well-informed decision today can lead to a more reliable and efficient septic system for years to come.