The Pentair 170020 FNS Plus Tank Lid Assembly restores a secured seal so your 36 sq ft DE filter runs at full strength again. Specifically, this genuine Pentair replacement part fits as intended. Moreover, it locks down evenly, and protects internal components from air intrusion and water loss.

What makes the Pentair 170020 Tank Lid Assembly the right replacement for my FNS Plus 36 sq ft filter?

The Pentair 170020 is an exact OEM replacement designed specifically for the FNS Plus 36 sq ft DE filter. Additionally, it maintains proper system pressure, eliminates leaks caused by worn or warped lids. Additionally, it protects your filter grids from air entering the system. When you order from ShastaPoolSupply.com, you receive authentic Pentair parts backed by expert support and fast shipping.