Valves Parts
138 products available
Check valves and inlet/outlet valves keep water flowing in one direction through the pump, preventing backflow that would otherwise cause pressure loss, priming problems, or pump cavitation. They're wear items — small enough to be easy to overlook, but a single stuck or worn valve can drop a pump's pressure output noticeably even when everything else is in good condition.
Valves Buying Guide
Match thread size and pressure rating
Confirm both the thread size/type (NPT vs. BSPP is a common mismatch on imported pumps) and the pressure rating before ordering — a valve that threads in fine but is under-rated for your pump's PSI will fail prematurely.
Sediment is the main cause of early failure
Grit and mineral sediment are the most common reason check valves stick or seat improperly. An inline filter ahead of the pump extends valve life along with seals and pistons.
Valves FAQ
How do I know if a check valve is bad?
Gradual pressure loss during operation, difficulty priming the pump, or pressure that drops off faster than it should when the trigger is released are the typical signs.