Super-Pro XtremeBlue A1 C4025/C4030 Filter Cartridge, 4-pack | X15-ULT-A1-M-Q4 C7370 a damaged seating surface will

a damaged seating surface will cause a new O-ring to fail prematurely

Pentair Part Number 355315Z Part Name Impeller HP Rating 1-1/2 HP Full Rate / 2 HP Up-Rate Quantity Included 1 (Each) Fits Into

featuring a 5/8-inch ID shaft bore

inspect all lateral arms at the same time — they are subject to the same mechanical stress and age at the same rate

Spas & Hot Tubs: Add 2–4oz directly to water

Super-Pro XtremeBlue A1 C4025/C4030 Filter Cartridge, 4-pack | X15-ULT-A1-M-Q4 C7370 a damaged seating surface willSuper Pro aftermarket filter cartridge replacement for use with the Hayward C4025 & C4030 cartridge filters. This is a 4 pack, for full filter servicing. For a single filter cartridge, see here.