What is an effluent filter?
Newer septic tanks (installed after the year 2000) are required to have an effluent filter located on the outlet of the septic tank. The filter protects the drainfield by trapping solids in the wastewater. If the septic tank is not pumped out periodically, the filter can become clogged with these solids; therefore, wastewater cannot flow into the drainfield. The result is wastewater backing up into the house.