Pentair 178582 Clean & Clear Plus 520 Tank Lid Assembly – Quad D E Cartridge Style Filters 100

Pentair Clean & Clear Plus 520 Tank Lid Assembly | 178582

Replacement lid for Pentair Clean & Clear Plus 520 filter tank. Ensures proper seal and pressure integrity. SKU 178582.

Features

• OEM replacement lid built to restore full sealing performance
• Compatible with 520 sq ft Clean & Clear Plus and Quad D.E. 100 filters
• Reinforced polypropylene construction resists pool chemicals
• Almond-tan finish matches original equipment
• Dimensional match, no plumbing changes required
• Approx. weight ~17.4 lbs; ships in 21.8 × 20.8 × 25.5 in box

Description

The Pentair 178582 Tank Lid Assembly is engineered as a durable replacement for the top cover of your 520 sq ft Clean & Clear Plus cartridge filter or compatible Quad D.E. 100 unit. Designed for long-term exposure to pool environments, its reinforced polypropylene structure resists cracking, UV damage, and chemical degradation. The precision molding ensures dimensional integrity — restoring the proper seal and maintaining tank pressure without requiring any modifications. This lid maintains performance consistency for your filtration system by preserving water flow and preventing leaks.

Pro Tip

For best results, replace the air relief valve and pressure gauge if yours are worn; they often fail before the lid. Pair with Pentair 192320 O-Ring (bulkhead seal) for a tight fit.

Installation Tips

Always depressurize and shut off pump before removing or installing the lid. Ensure the O-ring/gasket is clean, lubricated with silicone, and properly seated before tightening. Do not overtighten; crush the seal.