Pentair Automatic Feeder O-Ring Cap R172009 1 qt bottle so your water stays clean

so your water stays clean longer between cleanings

and temperature cycling for long service life

This reduces drag and makes the skimmer easy to control

Test your pool water and add the appropriate amount directly to water pre-diluted in a bucket

Pentair Automatic Feeder O-Ring Cap R172009 1 qt bottle so your water stays cleanPentair Automatic Feeder O Ring Cap R172009 Intro Keep your Pentair Rainbow automatic feeder performing at its best with the O Ring Cap R172009. This purpose built replacement cap preserves a tight seal, prevents leaks, and guards against dosing drift in day to day pool operation. Compatible with multiple Rainbow models300, 302, 300 19, 300 29, 300 29X, 320, and 322and their extensions, it delivers dependable, low maintenance chemistry management for