This 3/4" water check valve is installed in the inlet side of the circulation pumps plumbing to prevent the back flow of water through the circulation pump once the jet pump is activated.
Used on Endless Pools, Tiger River Spas, Hot Spring Spas, and Limelight Spas.
All water check valves have arrows stamped on the outside to indicate the direction of flow which should be pointer towards the circulation pump.
If water is leaking from around the check valve, it should be replaced.
A rattling check valve indicates that water is not being allowed to flow properly past/ through the check valve. Verify the check valve is installed with the flow in the correct direction.
Poor water flow through the check valve could lead to heater high-limit tripping. Ensure the check valve is not block by debris and operating properly.