Pentair Cartridge 520 sq. ft. | Clean & Clear Plus Filter 520 sq. ft. | R173578 PD165 serviceable union joint that allows

serviceable union joint that allows the pump or filter to be disconnected from the plumbing without cutting pipe

It includes Key Nos

Perfect For:

In-Line (incl 2" inlet and outlet ports) CL2002S Hayward Automatic Chlorine Feeder

Pentair Cartridge 520 sq. ft. | Clean & Clear Plus Filter 520 sq. ft. | R173578 PD165 serviceable union joint that allowsThe Pentair R173578 is the OEM replacement filter cartridge for the Clean & Clear Plus 520 sq. ft. cartridge filter, restoring full filtration capacity to one of Pentair's largest residential cartridge filter systems. IMPORTANT: 4 CARTRIDGES REQUIRED PER FILTER The Clean & Clear Plus 520 sq. ft. filter requires 4 of these cartridges for a complete service. This listing is for one (1) cartridge. Order 4 to complete a full replacement set. IMPORTANT: