Hayward Hydrostatic Relief Valve, 1-1/2", White | SP1056 Ladder Parts while CX875XRE is Hayward's part

while CX875XRE is Hayward's part number for the complete factory 4-cartridge pack — both are compatible with the Unicel C-7489

The CX500RE sits inside the StarClear filter tank and captures dirt

Can be used for both treatment and weekly maintenance

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling

Works overnight

Hayward Hydrostatic Relief Valve, 1-1/2", White | SP1056 Ladder Parts while CX875XRE is Hayward's partHayward Hydrostatic Relief Valve 1 1 2" SP1056 For 1 1 2 and 2 inch pipe size Features and Benefits: Helps prevent pool damage due to external hydrostatic pressure beneath the pool shell when pool is drained Valve should be replaced whenever the pool is drained White ABS, spring loaded, leakproof self cleaning o ring seal Noncorrosive and nonconductive