Unicel C-4440 Replacement Filter Cartridge | 40 Sq. Ft. | 16 3/4" | Sundance Spas Safety Signage 6 to prevent copper precipitation

6 to prevent copper precipitation and ensure your chlorine levels are 1-3ppm—high chlorine can cause copper-based algaecides to stain pool surfaces

Inner side rails include integrated side barriers to prevent entry behind the ladder

you can check the fill level without opening the lid

Finned aluminum enclosure

Unicel C-4440 Replacement Filter Cartridge | 40 Sq. Ft. | 16 3/4" | Sundance Spas Safety Signage 6 to prevent copper precipitationThe Unicel C 4440 is a 4000 Series 40 sq. ft. replacement filter cartridge built for Sundance Spas filtration systems. Featuring 158 precision folded pleats of 4 oz. Reemay 2040 polyester media across a 16 3 4" profile, it delivers thorough debris capture and sustained water clarity between cleanings. The castle style closed top cap and open bottom seat securely on your spa's standpipe no guesswork, no adapters. IMPORTANT: Some Sundance Spa Models Use