Pentair 170020 FNS Plus 36 Sq Ft Filter Lid Assembly

What This Part Is Used For
Pentair 170020 Lid Assembly - 36Sqft, FNS Plus is a replacement lid for compatible FNS Plus 36Sqft filter systems. It seals the filter housing.

Why This Part Matters
A secure lid is essential for maintaining system pressure. Cracks or warped lids can cause leaks and air intrusion. Replacing the lid restores proper filtration performance.

Key Features and Specifications

• Pentair manufacturer part number 170020
• For FNS Plus 36Sqft filter
• Filter lid assembly
• Seals filter housing
• OEM Pentair replacement part

Installation and Fitment Guidance
Relieve system pressure before removing the lid. Inspect O-ring and sealing surfaces during installation. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair manufactures cartridge filtration systems for residential pools. Their FNS Plus filters are widely used in the field. Using genuine Pentair lids ensures proper sealing and performance. Technicians rely on Pentair for dependable filtration components.

Common Service Context
This lid is commonly replaced when hairline cracks cause air leaks during filter operation.