This cap o-ring is designed to use with Pentair standard and high square feet module cartridge filters and also compatible with Pentair Rainbow automatic chlorine/bromine pool and spa feeder model 300, 302, 300-29X, 320, 322. Also fits Pentair Rainbow automatic chlorine/bromine feeder extensions.

• Cap o-ring replacement
• Fits Pentair standard and high square feet module cartridge filters
• Also fits Pentair Rainbow automatic chlorine/bromine pool and spa feeder model 300, 302, 300-29X, 320, 322
• Also compatible with Pentair Rainbow automatic chlorine/bromine feeder extensions