A sump pump that runs without removing water usually has a clogged intake screen, a failed check valve, a blocked or frozen discharge line, or a worn or jammed impeller. In each case the motor is working, but the water has no clear path out of the pit.
A Clogged Intake
The pump pulls water in through a screen near its base. Mud, gravel, and debris can cover that screen over time. With the pump unplugged, lift it slightly and look. Clearing the debris is often all it needs.
A Failed Check Valve
The check valve sits on the discharge pipe and keeps pumped water from falling back into the pit. If it sticks open, the same water cycles back down again and again. You may hear water rushing back after the pump shuts off. A stuck valve usually needs to be replaced.
A Blocked or Frozen Discharge Line
The discharge pipe carries water outside. Ice, leaves, or a crushed section of pipe can stop the flow, so the pump runs against a blockage. Check the outdoor end of the line for ice or debris, especially after a cold snap.
A Worn or Jammed Impeller
The impeller is the spinning part inside the pump that pushes water. Debris can jam it, and age can wear it down. A humming pump that moves little or no water often has an impeller problem.
A pump that runs nonstop can overheat and burn out, often right when you need it most. Unplug it if the pit is low, and watch the water level closely in wet weather.
Before calling, try these quick checks:
- Unplug the pump before touching it
- Look for debris on the intake screen
- Check the outdoor end of the discharge pipe
If the checks do not solve it, having the whole setup tested. A pump that keeps failing may point to other basement plumbing worth reviewing. Call JPR Plumbing at (833) 603-1840.