A sump pump check valve is a one-way valve on the discharge pipe that lets water flow out of the pit but stops it from flowing back in when the pump shuts off. It keeps the pump from having to move the same water over and over.
How It Works
When the pump turns on, it pushes water up the discharge pipe. The pressure opens a flap inside the check valve. When the pump stops, gravity tries to pull the water in the pipe back down. The flap closes and holds that water in place, so it does not drain back into the pit.
Benefits for the Pump
- It reduces how often the pump has to run
- It helps the pump last longer by preventing extra cycles
- It keeps the pit from refilling right after the pump stops
- It can lower noise from water rushing back down the pipe
Signs a Check Valve Is Failing
Listen after the pump shuts off. If you hear water rushing back into the pit, the valve may not be closing. You might also notice the pump turning on again only a short time after it stopped, even when it is not raining. A loud bang or thud when the pump shuts off can mean the flap is slamming shut, which can strain the pipes.
Keeping It in Good Shape
Check valves can get stuck with debris or wear out over time. They should be installed with the arrow pointing in the direction the water flows. A clear-bodied valve lets you see the flap, which makes it easier to spot problems.
A valve that sits on a cracked or loose section of pipe can also leak, so look at the joints too.
If your pump seems to cycle too often, having the pump and valve looked at can extend its life. For other basement water concerns, you can book a visit with a local plumber by calling JPR Plumbing at (833) 603-1840.