Pentair 24851-9000 System 3 Filter Lid Kit - 21in

What This Part Is Used For
Pentair 24851-9000 Lid Kit - System 3, Filter, 21in is a replacement lid kit for compatible Pentair System 3 21in filter tanks. It covers and seals the filter housing.

Why This Part Matters
A secure lid ensures stable internal pressure and prevents water leaks. Cracks or damaged lids can compromise filtration performance. Replacing the kit restores safe system operation.

Key Features and Specifications

• Pentair manufacturer part number 24851-9000
• For System 3 21in filter
• Lid kit assembly configuration
• Top housing cover component
• OEM Pentair replacement part

Installation and Fitment Guidance
Shut off the pump and relieve all pressure before removing the lid. Inspect gasket and mating surfaces prior to installation. Confirm by manufacturer part number before ordering.

About the Pentair Brand
Pentair has produced System 3 filters for many years in residential pool systems. Their OEM replacement lids maintain correct fit and pressure rating. Using genuine Pentair parts supports long term reliability. Service technicians depend on Pentair for filter components.

Common Service Context
This lid kit is often installed when aging lids develop cracks from UV exposure or pressure stress.