Pentair R172009 Cap O-Ring Replacement Pool and Spa Filter and Feeder
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.