Pentair Backup Ring, Stainless Steel, for FNS Plus and CNC Plus | 195339 HASA Their valves and filter components

Their valves and filter components are built for high-flow applications

Seals tank body to filter head

timeless finish for your mid-sized dual-element heating system

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Manufacturer part number DEX2421J2

Pentair Backup Ring, Stainless Steel, for FNS Plus and CNC Plus | 195339 HASA Their valves and filter componentsWhat This Part Is Used For Pentair 195339 Backup Ring FNS Plus CNC Plus Stainless Steel is a replacement backup ring for compatible Pentair FNS Plus and CNC Plus filter systems. It supports proper sealing within stainless steel filter assemblies. Why This Part Matters A backup ring helps maintain correct O ring compression under pressure. Replacing a worn ring restores secure sealing and prevents leaks. Proper internal sealing protects filter