If the drainpipe, also called the discharge pipe, gets clogged, the pump can’t move water from your basement to the outside of your home. If the water in your sump pit is moving slowly, or not at all, the drainpipe may be blocked by debris. You can repair this by cleaning the pipe. Remove the screen at the end of the drainpipe, if your pipe has one, and rinse off any debris that has built up on the screen. The end of the drainpipe will be outside your home, with the pipe draining on a downslope leading away from the house.
Check the pipe for any obvious blockages and remove, replace the screen.
Unplug the pump or turn off the power at the circuit breaker.
Remove the water in the sump pit using a wet-dry vacuum.
Grab the pump by the handle or the pump body and remove the sump pump unit from the pit. Do not lift the pump by the float switch or power cord.
Loosen the clamp that holds the drainpipe in place and remove the drainpipe from the main body of the sump pump.
Insert a plumber’s snake into the end of the pipe that was connected to the pump, and then try to push the snake through toward the other end.
Hold the pipe over a bucket or sink, and spray water down the pipe using a garden hose with a high-pressure nozzle if the plumber’s snake doesn’t remove blockage.
Run the plumber’s snake through again to loosen any remaining material inside the pipe.
Spray water into the pipe a final time to rinse the remaining debris from the pipe.
Attach the drainpipe to the pump and tighten the clamp to secure it in place.
Set the pump gently back into the pit and reconnect the power. Turn the pump on and pour water into the pit to make sure the assembly works as it should.