Step 6 · Test the Pump Operation

With the installation complete, it's time to test. Plug the pump's power cord back into the GFCI outlet. Use a hose or buckets to slowly pour water into the sump pit. As the water level rises, it will lift the float switch. When the float reaches its activation height, the pump should turn on with a hum. Watch as it quickly pumps the water out of the pit. The pump should shut off automatically as the float switch drops with the water level. During this test, carefully inspect all the connections, especially around the new check valve, for any signs of leaks.