What Can Cause A Septic Tank To Back Up?

Your septic tank is an essential component of your home’s sewage and plumbing systems. It is an underground chamber made of concrete, fiberglass, or plastic. Domestic water flows through these systems and brings waste out of your home. If you want to keep your septic system working properly, you need to schedule routine maintenance and tank pumping services.


When tanks are not properly maintained, you can end up with problems. The most common problems seen with septic tanks is clogging or backups. Let’s discuss what can cause your tank to back up.


What Can Cause A Septic Tank To Back Up?


The most common causes of septic tank backups are:




After heavy rainfall and storms, the soil around these tanks can become too moist for tanks to function. This often causes draining issues. When there is no dry soil to absorb the clean water, the waste mixes with the water and causes a backup in your system.


Tank Overflow


Scheduling routine septic tank pumping services is critical to your system. How often you need to pump your tank depends on the number of people in your house and the size of your tank. Typically, your septic tank can last for two to three years without pumping. However, many people forget to pump their septic tanks on schedule. When your tank gets too full, it can overflow and cause system backups.


Poor Installation


If you didn’t build your house, you might not have information on who installed the septic tank and how old it is. When you don’t know the quality of the tank or its size, you don’t know if it was installed efficiently or not. Improper installation can easily lead to backups. That is why it is always better to schedule an inspection of your tank when you purchase your home.




Clogs are commonly caused when households or businesses with septic systems put non-flushable items down the toilet or drains. When you have a septic system, only waste and toilet paper should be flushed. Facial tissues, baby wipes, feminine hygiene products, and other items that are not flushable will clog your septic tank.

Chemical Exposure


Chemicals are used to break down waste and keep your system clear. If the chemicals are present in higher quantities, it can damage your tank and cause backups.


Tree Roots


Sometimes, various tree roots can destroy your tanks, invade your system, or damage their components, causing your septic system to clog or backup.


Crushed Sewer Line


When sewer lines are damaged, they can cause a backup in your septic system. Since they are constantly exposed to outdoor elements, these lines can easily be crushed or damaged and cause your septic tank to malfunction.




Leaks can occur in the sewer or plumbing lines that can impact your entire septic system. When larger leaks impact the flow of your pipes, you will notice system backups.




When grease is flushed down your drains or toilets, they can build up in your pipes and cause your septic tank to back up.


Contact Bennett Excavation, Grading, Asphalt, Trenching & Septic for Your Residential Needs


Do you need help with your septic tank? Our Fontana septic service is the reliable, affordable team that residential customers trust. Contact us today to schedule an appointment.


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