Ingersoll Rand SS3L3 Compressor Check Valve – 56269590
An air compressor check valve is a one way valve designed to let the compressed air go from the compressor pump into the tank. Check valves allow the air to flow in one direction only, preventing backflow from the tank to the pump. A properly functioning check valve will prevent the compressor from having to start against backpressure, which can otherwise damage the motor and cause strain on the pump.
If you hear air leaking out of the pressure switch when the compressor is off, the check valve typically needs to be changed out. This results in debris or dirt causing the valve to stay open, letting high pressure air from the tank back through the small copper unloader line that connects to the pressure switch. If air leaks from the pressure switch when the compressor is shut off, you should replace the check valve rather than the pressure switch.
The Ingersoll Rand 56269590 check valve is most commonly used on the SS3L3 electric stationary compressor model, but can also fit the below compressors as well. This valve is located underneath the top plate where the discharge tube from the SS3 pump enters the tank. You can locate this valve by tracing the discharge tube or the small copper unloader line that goes from the pressure switch back to the tank.
56269590 is an OEM check valve by Ingersoll Rand