Pentair O-Ring, Front Housing | Challenger High Flow | 355329Z

Description

The 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-ring seats between the front housing and the pump body on the Challenger High Flow pump. A failed or degraded front housing O-ring allows water to leak at the housing joint, reducing system pressure and accelerating wear on surrounding components. Replacing this O-ring at the first sign of seepage restores the housing seal and protects the pump from further damage.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment’s manual or on the original part itself before ordering.

Poolaroo Pro Tip

When replacing this O-ring, clean the housing groove thoroughly before seating the new ring — debris or residue left in the groove is a leading cause of premature seal failure. Apply a thin, even coat of Pentair R172351 Lifeguard Silicone Lubricant before installation to ensure the O-ring seats correctly and resists compression set over time. Never use petroleum-based lubricants — they degrade rubber O-rings and will void the seal quickly.