Pentair O-Ring, Front Housing | Challenger High Flow | 355329Z Chlorine Neutralizers This set supplies all eight

This set supplies all eight grids — in the exact configuration your filter requires — so you can perform a full filter re-grid in a single service call

If possible

if your old cartridge differs from those figures

When your Hot Springs

This product is designed for use in properly balanced pool water

Pentair O-Ring, Front Housing | Challenger High Flow | 355329Z Chlorine Neutralizers This set supplies all eightThe Pentair Front Housing O Ring (355329Z) is the OEM replacement sealing O ring for the Challenger High Flow pump series, preventing water from bypassing the joint between the front housing and the pump body. IMPORTANT: LUBRICATION REQUIRED SOLD SEPARATELY Always lubricate this O ring with a silicone based lubricant before installation. We carry the Pentair R172351 Lifeguard Silicone Lubricant the OEM matched product for Pentair equipment. This O