Pro tip: Use a metal probe rod. Poke the ground every 2 feet in a line from the house. When you hit concrete or fiberglass 2-3 feet down—bingo.

Have someone inside the house flush a toilet. If the water flows freely through the baffle and into the tank, you have cleared the clog. Step 4: Check the Effluent Filter

To unclog a septic tank yourself, you'll need:

Slide it back into the outlet baffle securely. Step 5: Address Main Line Clogs

You will get dirty. Embrace the grime.