Plastic vs Concrete Septic Tanks

Maybe you already know what a septic tank is designed for. However, you may not know the difference between plastic vs concrete septic tanks. Luckily, you’re here now.

In this guide, you’ll discover everything you need to know about septic tanks. More importantly, you’ll learn the pros and cons of a plastic vs. concrete septic tanks. This will help you decide which one fits your budget and your needs.

Septic Tanks
Septic Tanks

Septic Tanks – What You Need To Know

A septic tank is an underground sedimentation watertight tank that is used for wastewater treatment. It allows for a safe method of wastewater disposal in areas that have poor drainage systems or are off the mains sewage network.  Thus Septic tanks manage wastewater from toilets, faucets, and washroom.  Therefore making them the most crucial aspects of the plumbing structure of a building. If anything goes wrong with your septic tank; it could cause and number of damages to your property. Hence, it’s best to fix it or buy a new one (if need be) as soon as you can in order to avoid disrupting your entire plumbing system.  The two most common materials used for septic tanks are plastic and concrete. We’ve highlighted the pros and cons of each for you below.

Plastic septic tank 


  • A plastic septic tank is cheaper and pocket-friendly compared to a concrete septic tank. 
  • These septic tanks do not crack as much as a concrete septic tank.
  • Plastic septic tanks require minimal installation. It requires less time, equipment, and individuals, thereby reducing expenses.
  • These septic tanks are less prone to water-based corrosion and is rust-resistant.
  • They are more hygienic compared to a concrete septic tank.


  • A plastic septic tank has a lower lifespan than a concrete septic tank.
  • It is not as firm as a concrete septic tank and can be crushed easily by the weight of the soil.
  • These septic tanks can not be used in all states, as it is yet to gain approval in every state.
  • It requires more maintenance, and it’s lightweight.
  • Plastic septic tanks have low effluent levels. 
  • These septic tanks are susceptible to the environment and can easily be affected by soil conditions.
  • It can be damaged at installation.

Concrete septic tank


  • Concrete septic tanks are approved for use in all states.
  • Require minimal maintenance compared to plastic septic tanks.
  • Have a longer life span compared to a plastic septic tank.
  • Are not easily affected by soil conditions and environmental changes.
  • They have high effluent levels.
  • The concrete septic tank can last up to forty years if properly maintained and drained regularly.
  • Since it is made from cement, they’re stronger than plastic septic tanks.
  • The concrete septic tank is watertight, which reduces the risk of leaks.


  • Concrete septic tanks are very expensive to buy and install, as they are heavy, require time and heavy equipment.
  • Concrete septic tanks are more prone to corrosion and can easily crack as time goes on.

Which septic system you purchase is entirely up to you. Therefore, consider the tips we shared and let them guide your decision. Keep in mind that if you live in a remote area, your best bet might be to use a plastic septic tank instead since it’s easier to get and install. You should also consider the soil quality of your environment. If it’s highly acidic, you should opt for a plastic septic tank.

Are You Having Difficulty With Your Septic Tank?

We are a team of professionals, and we can take the stress of repairing and installing your septic tank off you entirely. 

Contact us today. We are here to help!

Check out these links and other Maxx’s Products Blog Posts for tips and tricks on your home maintenance care!

How to maintain your top 3 home appliances
Does your septic tank need a pump out?
The best soils and soil types for your drain field
Why having a Septic Tank is simply better