Unicel C-5396 Replacement Filter Cartridge for Waterway Top-Load & Coast Spas | 100 Sq. Ft. | 21 5/16" Rope Anchors & Hardware uniform pore structure that resists

uniform pore structure that resists channeling and delivers reliable dirt capture throughout the cartridge's service life — the PA40 is a drop-in replacement that restores full filter performance without guesswork

the two are visually similar but rated for different temperature and chemical environments

Require weight to prevent steps from floating

Helps prevent scaling of the cells and extends cell life

and Pentair Dorado automatic pool cleaners

Unicel C-5396 Replacement Filter Cartridge for Waterway Top-Load & Coast Spas | 100 Sq. Ft. | 21 5/16" Rope Anchors & Hardware uniform pore structure that resistsThe Unicel C 5396 is a 5000 Series 100 sq. ft. replacement filter cartridge engineered for Waterway Plastics top load in line spa filters. With 222 precision cut pleats of 3 oz. Reemay 2033 polyester media packed into a 21 5 16" body, this cartridge delivers maximum filtration surface area in a compact diameter keeping your spa water consistently clear between service intervals. IMPORTANT: VERIFY YOUR DIMENSIONS BEFORE ORDERING Coast Spas