Experts recommend that you inspect and test your sump pump at least every three to four months. The inspections should revolve around checking sump crocks for debris, checking the sump check valve, checking the electrical socket, the power cord, and more.However, it all depends on what you use the pump for. Soapy water tends to interfere with the functionality of sump pumps. So, if you use your pump device to dispose of water from your washing machine, you may want to examine it more frequently.