Pentair R172323 1/4-Inch Corrosion Resistant In-Line Check Valve Replacement Pool and Spa Automatic Feeder Corrosion resistant in-line check valve replacement Fits Pentair pool and spa automatic feeder models 300 and 302 Comes with 1/4-inch tube by 1/4-inch tube Measures 16-3/4-inch length by 13-1/2-inch height by 16-3/4-inch width