Unicel Replacement Filter Cartridge 27.5 sf Martec | C-4301 Spa Light Consider rotating between two cartridges

Consider rotating between two cartridges (one in use

Invest in the best for your pool or spa system and order your repair kit today

and install the new CX3000J1 screen

Place the new SPX1600S gasket in the groove

Unicel Replacement Filter Cartridge 27.5 sf Martec | C-4301 Spa Light Consider rotating between two cartridgesUnicel C 4301 Replacement Spa Filter Cartridge 27. 5 Sq Ft (Open Top & Bottom, 2 1 8" ID) The Unicel C 4301 is a premium pleated replacement spa filter cartridge designed for select Martec and Sonfarrel style filter canisters that use a compact cartridge with open ends. It captures fine debris to help keep water clear while maintaining strong circulation when rinsed and cleaned on a regular schedule. Key Features 27. 5 sq ft filtration area for