Before you begin
- Locate the pit, usually in a corner of the basement
- Check that the plug is seated in a working receptacle
- Have a bucket of water ready
Steps
- Remove the lid and look for debris in the pit.
- Pour water in slowly until the float rises.
- Watch the pump start and empty the pit.
- Check that it stops when the water drops.
- Go outside and confirm water exits the discharge pipe.
- Listen for grinding or rattling noises.
- Test the backup where a battery unit exists, by pulling the main pump's plug.
The check valve. When the pump stops, you may hear a thud as the check valve closes. If water rushes back into the pit, the valve may need attention.
Signs of trouble
- The pump hums but does not pump
- The float sticks against the pit wall
- The pump runs continuously
- The discharge is frozen or blocked
Problems found during testing are covered under sump pump repair. If the sewer side is also a concern, a sewer camera inspection helps. A running toilet wastes water in the same quiet way a stuck float does; see fixing a running toilet.
Worth knowing
Answers our Mississauga crew gives most
How often should I test?
Yearly before the thaw, and again before any long absence.
Should I clean the pit?
Yes, remove debris that could jam the float or intake.
How long does a pump last?
Many last seven to ten years, depending on use.