Septic Tank: How Long It Will Last with Proper Care
Jun 16, 2023

A septic tank is an essential component of your home’s sewer system. It collects and stores waste and wastewater flowing out of your home. There are different types of septic tanks like concrete, plastic, and fiberglass septic tanks, and have different lifespans.


A septic tank can last anywhere from 20 to 40 years or more if properly maintained. The exact lifespan of a septic tank depends on the type of system, soil and groundwater conditions as well as how often it is used. Septic tanks must be pumped out every few years to remove stored waste and keep them functioning correctly.(1) Keep reading to learn more.

The Lifespan of a Septic Tank Based on Its Type

There are different types of septic tanks. Here are common septic tank types and their lifespans;


A concrete septic tank – A well-built and maintained concrete septic tank can serve you for 20-30 years. Some can even last for more than 40 years. A concrete septic tank is one of the most durable septic tanks, but it is prone to cracks, if not well-built and cared for. 


Fiberglass septic tank – a properly installed and maintained fiberglass septic tank can last for more than 40 years. It is unaffected by sewage and gases produced in the tank.  It is lightweight and easy to install and it is considered more efficient than a concrete tank. 


Plastic septic tank – A plastic septic tank can last for approximately 30 years with proper care. Plastics are durable and immune to water corrosion, but can easily crack. 


Steel septic tank – The average lifespan of a steel septic tank is 14-20 years. While steel is one of the strongest materials, it is prone to rusting, especially when installed in an area with acidic soils and groundwater. And that is why it has a much shorter lifespan compared to other common types of septic tanks. 

Factors That Shorten the Lifespan of Your Septic Tank

Many factors will shorten the lifespan of your septic tank. Here are a few factors;


Acidic Soil and Groundwater – Acidic soil and groundwater will corrode steel and concrete over time. It can also weaken plastic septic tanks and it may not last as desired. So before you install your septic tank, find out if the location has acidic soil and groundwater.  If so, find ways to neutralize the acidity or pick another location.


Flushing ‘Wrong’ Items Down the Drain – If you flush unsafe items down the toilet and drains, that will likely weaken the septic tank or make it get full quickly, requiring you to call a reliable septic tank pumping Chattanooga company for pumping. For instance, if you flush hazardous products like insecticides or pesticides down the drain, they might kill bacteria in the tank, reducing the breakdown of solid waste in the tank. And that will make the tank less efficient. 


Poor Maintenance – If you don’t take care of your septic system, your tank may not last as recommended. If you don’t hire one of the best-rated septic tank pumping companies in Chattanooga area to pump your system every 3-5 years, your tank may not serve you for long. If you don’t inspect and clean the tank regularly, it may not last as desired. 


Excessive Use of Water – If you use too much water in your home, you will be overworking your septic tank. That may affect bacteria concentration in the tank. It may also make your tank get full quickly, requiring you to hire a Chattanooga septic tank pumping company. And considering the cost to pumping septic tank in Chattanooga TN, you will likely spend a lot of money in the long run. 

Ways to Extend the Lifespan of Your Septic Tank

Here are excellent ways that can help extend the lifespan of your septic tank;

septic tank pumping chattanooga

Timely Pumping

This is one of the most excellent ways that can extend the lifespan of your septic tank. Timely pumping also ensures your sewer system functions efficiently, preventing issues like foul odors, slow drains, pools of sewage in the yard, and sewage backflow in your home. You need to hire a top-rated septic tank pumping Chattanooga company to pump your tank every time it gets full. 

Flush Down the ‘Right’ Waste/Items Down the Drain 

Many items can damage your septic system. Baby wipes, diapers, cat litter, cigarette butts, coffee grounds, dental floss, disinfectants, paper towels, paint, pesticides, and insecticides can weaken or damage your septic tank and system. Why? The septic system is not built to break down and store these substances and items. So avoid flushing them down the drains. 

Regular Inspection and Cleaning

One of the easiest ways to extend the lifespan of your septic tank is regular cleaning and inspection. A regular professional inspection helps identify minor issues that if not addressed soon can worsen over time and you may be forced to replace your tank. In addition, you need to pump and clean your septic tank regularly. So hire a reliable septic tank pumping Chattanooga TN company that can pump and clean your tank. The pumping team will also share tips that will make your septic system more efficient and last longer. 

Conserve and Reduce the Flow of Wastewater

Your septic tank has a specific amount of waste and wastewater it can efficiently and safely handle.  If you use too much water in your home, more wastewater will end up in the septic tank, and that will significantly affect its lifespan. Conserve water and you’ll reduce the flow of wastewater into your septic tank. That will help your system process sewage more efficiently. It will also extend the lifespan of your septic tank. 

Maintain the Drain Field

The drain field or leach field is also part of your septic system. The drain field filters out contaminants and nutrients from wastewater coming from the septic tank through underground perforated pipes. You can maintain your drain field through proper landscaping and keeping off obstructions. Also, avoid parking or driving heavy machinery or car on the drain field. Most importantly, direct rainwater away from the drain field.


For more information on Flush Fellas Septic & Excavating and our services, feel free to reach us via phone today: (423) 498-9839.


About the author

Charles Chandler

Charles Chandler is the founder of Flush Fellas, a septic and excavating company based in Chattanooga, TN. With a passion for providing top-notch services to his clients, Charles has established himself as a prominent figure in the industry. He has extensive knowledge of septic systems, excavation, and drainage solutions, which he uses to offer customized services that meet the specific needs of his clients. Charles is committed to providing exceptional customer service and building long-term relationships with his clients. He is dedicated to staying up-to-date with the latest industry trends and innovations to ensure that Flush Fellas continues to offer the best services possible.

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