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

This is a complete kit containing the filter base

of filtration area for Hayward SwimClear cartridge filter systems

At 23 1/8" long and 10 1/8" in outer diameter

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