Pentair System 3 Filter Lid Kit, 21" | 24851-9000 Loveseat Draft-Resistant Technology: Engineered to remain

Draft-Resistant Technology: Engineered to remain effective in breezy conditions where traditional heaters often struggle to maintain temperature

integrating into the air delivery path of jets and spa bubbles

and accessory package

Install with system off and depressurized

repeatable application

Pentair System 3 Filter Lid Kit, 21" | 24851-9000 Loveseat Draft-Resistant Technology: Engineered to remainWhat 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