Perma-Cast 4" Anchor Socket, Plastic | PS-4019-P Cartridge Filters Transfer the core block/plug from

Transfer the core block/plug from your old cartridge into this new one before reinstalling

Frame size: 9" round

not the main drain

Premium performance: necessary for proper cleaner functionality and performance on various Polaris pressure-side pool cleaners by assisting with regulation of water pressure flowing through the dedicated pressure return line from the booster pump

of filtration capacity

Perma-Cast 4" Anchor Socket, Plastic | PS-4019-P Cartridge Filters Transfer the core block/plug fromThe Perma Cast 4" Ladder and Rail Socket made from Cycolac Plastic, this socket This accommodates 1. 9" outer diameter tubing. Features and Benefits: High quality materials for durability and longevity Fabricated from Cycolac Plastic For Mounting Inground Ladders and Rails Installs in Concrete Deck