VALVE - CHECK 5 PSI (Crown CR117380)

A damaged check valve can allow reverse flow, leading to system pressure loss and erratic operation. Crown, the OE maker, lists this part under number CR117380. This aftermarket replacement valve opens at a preset 5 PSI to permit flow in one direction only. Its plain mechanical function is to block backflow when downstream pressure exceeds the cracking threshold. A common failure consequence is that a stuck-open valve fails to hold pressure, causing load drift or slow response. During a routine service interval, a technician may find the valve seat worn or contaminated. Verify the serial number or application, then call (562) 693-7748.

Part number variants: CR117380, cr117380