Media filters (sand filters, gravel filters, etc.) are not maintenance free. Tank maintenance and septic filter and system installations should always be performed by licensed and insured professional.
Septic tank filters are designed to keep solid particles in the septic tank. They are located on the outlet side of the tank where the tee is normally placed.
Some filters fit inside the tee and some replace the tee. There are several different filter designs for residential applications and also for commercial use.
Rather than just forget about your tank, which is easy to do, the filter can be used to remind you that it's time to pump your tank.
Most residential filters cost less than $100 and are easy to install when the system is new or when you have it pumped out. Compared to the cost of replacing a drain field, this is cheap insurance.
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