Pentair 357255Z O-Ring - 2-357, Buna N 70

What This Part Is Used For
The Pentair 357255Z O-Ring is used in equipment assemblies requiring a #2-357 seal made from Buna N 70 material. It helps maintain a watertight and airtight connection under operating pressure.

Why This Part Matters
A compromised O-ring can introduce air into the system or allow water to leak out. That affects filtration performance and pump efficiency. Replacing it restores proper sealing and stable system pressure.

Key Features and Specifications

• Manufacturer part number: 357255Z
• O-ring size: #2-357
• Material: Buna N 70
• Used in Pentair equipment applications
• Replacement sealing component

Installation and Fitment Guidance
Inspect the sealing surface for wear before installation and lubricate lightly. Avoid stretching excessively during placement. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair produces pumps, filters, heaters, and automation systems used worldwide. Their equipment depends on precision sealing components. OEM O-rings ensure correct compression and durability. Professionals rely on Pentair parts for reliable repairs.

Common Service Context
Frequently replaced during pump rebuilds or filter service when addressing suction leaks or pressure drops.