Pentair 170022Replacement Tank Lid for FNS Plus 60 sq ft DE Filter
The Pentair 170022 is the OEM replacement tank lid assembly designed for the FNS Plus 60 sq ft diatomaceous-earth (DE) pool filter. This lid closes and seals the filter tank, ensuring the internal pressure and flowthrough during filtration and backwash cycles are maintained properly.
Key Features
- Tank lid assembly sized for 60 sq ft FNS Plus DE filters (model FNSP60).
- Manufactured from pool-rated, corrosion-resistant materials compatible with DE filtration systems.
- OEM-spec partdesigned to match the original FNS Plus tank geometry and clamp assembly for a correct, leak-free fit.
Specifications
- Brand: Pentair
- Part Number: 170022
- Intended Filter Model: FNS Plus 60 sq ft DE filter (FNSP60 and compatible variants)
- Material: Pool / DE filter-rated thermoplastic / molded plastic suitable for pressurized filter tanks
When to Use / Replace
Replace the 170022 lid if the original is cracked, warped, leaking. Replacement is also necessary if the lid can no longer form a reliable sealcommon causes include freeze damage, impact damage, or chemical degradation. A proper tank lid is critical to maintain safe, efficient filtration performance in DE filters.
Installation & Maintenance Tips
- Turn off the pump and relieve all pressure before removing the old lidalways ensure the system is depressurized before maintenance.
- Inspect the sealing surface on top of the filter tank and the gasket / O-ring (if present)clean or replace as needed to ensure a tight seal.
- Transfer the pressure gauge and air-relief valve from the old lid to the new one, ensuring components are properly seated and tightened.
- Re-install the clamp band (or clamp ring) evenly around the tank, gradually tightening to avoid deforming the lid or tank.
- After installation, refill and prime the systemcheck for leaks at the lid seam, clamps, and around the air-relief before running the pump under full pressure.
- Periodically inspect the lid for cracks, UV degradation, or chemical damagereplace immediately if the integrity is compromised.
