Unicel UHD-SR50 Replacement Filter Cartridge 52 sq. ft. | Sta-Rite Posi-Flo 50 Door & Gate Alarms Fits any standard size telescopic

Fits any standard size telescopic pole

Reemay 2040 polyester media and a 3-1/2" female pipe thread (FPT) top cap

OceanBlue A-Frame Ladder

Many compatible Maax and Elite Spa models use a dual-filter system requiring two (2) cartridges for a complete service

Remove any winter plugs

Unicel UHD-SR50 Replacement Filter Cartridge 52 sq. ft. | Sta-Rite Posi-Flo 50 Door & Gate Alarms Fits any standard size telescopicThe Unicel UHD SR50 is a premium UHD Series replacement filter cartridge delivering 52 sq. ft. of heavy duty filtration area for Sta Rite Posi Flo 50 pool and spa filter systems. Built with 4 oz. Reemay 2040 heavy duty polyester filtration media a full ounce heavier than standard 3 oz. cartridges the UHD SR50 delivers superior dirt holding capacity, enhanced durability, and extended service intervals. With 195 precision formed pleats maximizing media