Pentair R172272 1/2-Inch NPT 90-Degree Tube Fitting with Nut Replacement Rainbow Automatic Chlorine/Bromine Pool and Spa Feeder Tube fitting replacement Fits Pentair Rainbow automatic chlorine/bromine pool and spa feeder models 320, 322, 300-29X Also fits Pentair Rainbow automatic chlorine/bromine feeder corrosion resistant flow indicator model R172627 Includes nut 90-Degrees and measures 1/2-inch NPT