The Unicel 5CH-402 R is a compatible replacement for the following pool and spa water filter cartridges:
The Unicel 5CH-402 Comp. Pool & Spa Filter Cartridge is a pool filter cartridge replacement constructed with 45 sq. ft. of pleated Reemay filter media for the reduction of contaminants in swimming pool and spa water. This compatible Unicel spa filter, also known as the Filbur FC-2811, measures 5 1/2" x 11" with a Closed Crescent Handle top style and 2" MPT bottom style.