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Pentair

Pentair FNS Plus Tank Lid Assembly 36 sf | 170020

Pentair FNS Plus Tank Lid Assembly 36 sf | 170020

$299.99 USD
$299.99 USD
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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. 

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Key Features

  • Genuine Pentair OEM tank lid assembly
  • Designed for FNS Plus 36 sq ft DE filters
  • Restores proper internal pressure
  • Creates a secure, even seal
  • Durable construction
  • Direct replacement for worn, cracked, or leaking lids

Technical Specifications

  • Filter Size Compatibility: 36 sq ft
  • Filter Type: DE (Diatomaceous Earth)
  • Application: In-ground pool filtration systems

Specs

How does the Pentair FNS Plus 170020 lid assembly compare to aftermarket replacements?

The genuine Pentair lid assembly delivers consistent sealing performance because it follows exact factory specifications. Specifically, aftermarket versions may cost less upfront, yet they often vary in thickness or alignment, which can lead to leaks or uneven clamp pressure. Over time, that difference affects filtration performance and system longevity. Moreover, for reliable results and long-term value, most professionals choose the OEM Pentair 170020.

Best For: Restoring Seal and Pressure in 36 Sq Ft FNS Plus Filters

This lid assembly works best maintaining a Pentair FNS Plus 36 sq ft DE filter. Specifically, if your current lid shows cracks, warping, or persistent air leaks, this replacement solves the problem. Additionally, it helps maintain steady pressure, which supports better circulation and cleaner water. Moreover, replacing the lid prevents unnecessary strain on pumps and internal grids.

About Shasta Pool Supply

As part of Arizona’s most trusted pool company, ShastaPoolSupply.com offers reliable OEM Pentair parts, professional product guidance, and fast shipping. Furthermore, our experts help you choose the right components for your pool system so you maintain strong performance without overspending.

To see more product like the Pentair FNS Plus Tank Lid Assembly, click Waterco MultiCyclone 16 Centrifugal Filter.

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What our customers are saying

Love, love, love our new pool!!! If you're looking for a responsive team whose commitment to quality is unmatched, that's exactly what we received.

Honestly couldn't have asked for anything more out of this experience. We highly recommend Shasta!!

Smith M.

Easy. Seamless. Product was priced well, easy to order and shipped promptly. Will be a returning customer. Thank you for being a great company!

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Clinton was the best!! I needed a cleaner with a good hose, oh and did he deliver!! He knows his hoses!!

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