baffle (noun) :to check or deflect the movement of (sound, light, fluids, etc.)
Septic tanks operate full and settle into different levels. Scum at the top, effluent in the middle and sludge at the bottom. Baffles help to maintain this environment. An inlet baffle prevents new flows entering the tank from churning the layers within. An outlet baffle prevents any solids from entering the next septic component.

It is imperative that your pump, distribution box and/or absorption area receive only effluent separated from any solids. Solids (scum, sludge or other materials) can cause clogs and blockages that can eventually lead to system malfunction and failure.

Outlet baffles should include a gas deflector. Gas can buildup within the sludge layer and then bubble up. The bubbles will carry solids with them into the baffle and eventually into the next septic component. Gas deflectors are typically installed on the outlet baffle. Some outlet baffles include an effluent filter. This is an additional tool to help prevent solids from leaving the septic tank. Pumping is recommended every 2-3 years, or as needed. Some townships now require pumping at regular intervals, you can check with your local Sewage Enforcement Officer for more information. Your pumper can also help you determine a regular pumping schedule that best fits your home.


Protecting Pennsylvania citizens through sound management, proper maintenance, and environmentally conscious disposal of wastewater.