What to Do When Your Sump Pump Fails

If your sump pump fails, you’ll probably only become aware of it after water begins entering your basement. It’s difficult to tell if a sump pump’s defective until it fails to actuate at a crucial time. Most of the time, you’ll have to begin by removing some water from the basement. If water is limited to minor pooling around the sump basin you may be able to handle clean-up yourself. If flooding is widespread across the basement floor, call professional water damage recovery services.

Caution: Water flooding the basement floor poses an electrocution hazard. Avoid all contact with water until electricity has been shut off at the main electrical panel. If you cannot safely access the main panel without contacting water, call an electrician to turn power off at the meter.

  • After the area is safe to enter, remove minor pooling by mopping or using a wet/dry vacuum.
  • Bail out the sump basin with a bucket and look for any debris or other objects that may be obstructing the pump inlet screen. Unplug the pump, remove the pump and clean the inlet screen.
  • Reinstall the pump. Pour five gallons of water into the sump basin to determine if the pump automatically actuates. If you don’t hear the pump motor run, the motor or float switch is probably defective. You’ll need a professional plumber for further troubleshooting and/or replacement of the unit.
  • If you hear the pump motor actuate, go outside where the end of the discharge pipe releases water—usually somewhere in the backyard. Check to see if water is flowing out of the pipe. If not, check for any obstructions at the end of the pipe. If no obstructions, the pump impeller or some other internal part is likely faulty. You’ll probably need a new pump.
  • If the pump empties the basin and shuts off, but water rapidly flows back into the basin from the discharge pipe and actuates the pump again, the check valve to prevent backflow through the discharge pipe is probably defective. A plumber can replace that component.

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