W Cooper Hub w/Standpipe [RS-3020 No Laterals] (3021A) uvgenerators A replacement spa or pool

A replacement spa or pool filter cartridge helps remove suspended debris so the water-care system can continue operating more effectively

Supports cleaner and more dependable plumbing control

plumbing position

Filter cartridge for compatible applications using FC-2397

W Cooper Hub w/Standpipe [RS-3020 No Laterals] (3021A) uvgenerators A replacement spa or poolW Cooper Hub w Standpipe [RS 3020 No Laterals] (3021A) is a W. Cooper Industries hub with standpipe for compatible RS 3020 No Laterals filter assemblies. The hub and standpipe help direct water through the filter system and are key internal components in proper filtration performance. This replacement version is listed without laterals, making it useful when the standpipe or hub requires replacement but the matching lateral set is handled separately.