Unicel Replacement Filter Cartridge 50 sf | 4CH-50 Pool Filter Parts Connection Sizes: 2″ slip (primary)

Connection Sizes: 2″ slip (primary) with 2½″ spigot option—reducers available for 1½″

This valve acts like a radiator cap

Effective with all pool filtration systems

Always troubleshoot the cause of low flow first (filter/basket condition

Replace O-rings any time they become flattened

Unicel Replacement Filter Cartridge 50 sf | 4CH-50 Pool Filter Parts Connection Sizes: 2″ slip (primary)Unicel 4CH 50 Replacement Spa Filter Cartridge 50 Sq Ft (4" OD x 14" Length, 1 1 2" MPT Threaded Bottom) The Unicel 4CH 50 is a high capacity 50 sq ft pleated spa filter cartridge designed for select hot tubs and spa filter canisters that use a threaded screw in bottom connection. With its compact 4" diameter body and taller pleat pack, it provides strong debris capture and longer run time between cleanings compared to smaller cartridges. Key Features