What you need
- A five-gallon bucket of water
- A flashlight
- Access to the pit lid
- Someone outside to watch the discharge, if possible
The test
- Confirm the cord is in and that outlet is live.
- Remove the pit lid.
- Tip the bucket in gradually.
- As the float rises the motor should engage, empty the pit and switch off neatly.
- Note any grinding, rattle or hard thump at shut-off.
- Check outside that water exits the discharge pipe and flows away from the house.
Warning signs
If the pump hums without moving water, runs without stopping, starts and stops rapidly or does not start, it needs service. Rust on the discharge pipe, a cracked check valve or water backflowing into the pit after shut-off are also signs.
Test the battery backup separately by unplugging the main pump while filling the pit.
Help
Problems found? Our pump repair and backup pump pages explain the fixes.
Check valve and discharge
After the pump stops, listen. A loud thump is the check valve closing; a faint sound of water draining back into the pit means it is not sealing. Outside, the discharge should be clear of snow, ice and debris and direct water well away from the foundation.
Noise and vibration
Grinding or rattling may mean debris in the impeller or worn bearings. Excess vibration can loosen the discharge pipe. Secure it with clamps.
When to put the tools down
Some of this is homeowner work and some is not. Stop and phone us if you see any of these:
- Motor hums while the pit level stays put
- Float sticks against the pit wall
- Pump runs every few minutes in dry weather
- Discharge pipe freezes or ices up at the outlet
- Anything involving the gas line, the venting or cutting into a wall