The Filbur FC-2372 is a compatible replacement for the following pool and spa filters:
The Pentair Rainbow Leaf Trap Spa Filter Cartridge is built with reinforced center cores and end caps for added strength and durability. Also known as Filbur FC-2372, Unicel C-4321 and Pleatco PRB25-IN-TC, this spa and hot tub filter is made from genuine Reemay spunbound polyester media. The end caps are made from a durable polyurethane material and the center cores are comprised of punched PVC pipe for consistent flow. Some generic brands use thin injection molded walls that are prone to collapse over time. This filter is made to the exact specifications and style used by the manufacturer of your hot tub or spa.
Pentair Rainbow Leaf Trap Filter specifications:
The Pentair Rainbow Leaf Trap Spa Cartridge works with the following manufacturer's filters/hot tubs: Rainbow Plastics and Pentair Pool Products. Filbur filters are made in the U.S.A.
How to properly clean your spa filter cartridge: