Unicel C-4405 2-Pack | 50 sq ft Rainbow DSF Spa Filter Type_Gas Stove Pipe and mineral buildup that clog

and mineral buildup that clog spa filter cartridges

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Plate: ALPL4017 (rectangle)

Unicel C-4405 2-Pack | 50 sq ft Rainbow DSF Spa Filter Type_Gas Stove Pipe and mineral buildup that clogThe Unicel C 4405 is a matched pair of replacement filter cartridges delivering 50 square feet of combined filtration for Pentair Rainbow Dynamic Series IV systems and Waterway skim filters. It is sold as a set of two because the system is designed around two cartridges working side by side not because two is a convenient bulk quantity. That distinction matters more than it might sound. These housings run a pair of compact cartridges in parallel