Pentair Superflo VS/VST Lid O-Ring || 357255Z

Genuine Pentair lid o-ring for SuperFlo, SuperFlo VS/VST, and OptiFlo pumps — ensures watertight seal.

• OEM lid o-ring for SuperFlo / SuperFlo VS / SuperFlo VST / OptiFlo pumps
• Durable Buna-N (Shore-70) material resists pool chemicals & UV exposure
• Exact #2-357 o-ring geometry per Pentair parts sheet
• Restores a leak-free seal between the pump lid and housing
• Simple, drop-in replacement — no modifications needed

This Pentair 357255Z lid o-ring (also referenced as #2-357) is a direct replacement for Pentair’s SuperFlo, SuperFlo VS/VST, and OptiFlo pump lids. Over time, o-rings naturally degrade — becoming brittle or flattened — which can lead to leaks or loss of prime. This OEM replacement restores sealing integrity, providing a tight, water- and air-resistant fit. Designed to Pentair’s original dimensions, it installs easily in the lid groove for fast maintenance turnaround.

Apply a thin layer of silicone o-ring lubricant before installation to ease seating and reduce wear. Always reuse an o-ring when opening the lid — pairing this with a refreshed clamp ring (eg, SKU 357239Z) helps maintain a complete, robust seal.

• OptiFLo Pump Parts and Accessories
• SuperFlo VST Pump Parts and Accessories

Always disconnect the pump from power before servicing. Clean the seating surfaces and grooves thoroughly of debris before placing the O-ring. Don’t distort or stretch the o-ring — place it evenly. Use a compatible lubricant if needed and ensure proper reassembly of the ID and clamp.