Sta-Rite 18201-0150 ABS 6-Position Multiport Valve, 1 1/2 Inch Valve Port with 1 1/2 Inch Piping, Union Connection Design 6-Position multiport valve Fits Pentair Sta-Rite System 3 SD and SS-Series pool/spa D.E. filters Also fits Pentair Slide valves ABS slide valves/multiport valves and 1-1/2 and 2-inch multiport side mount valves Includes union connection 1-1/2-inch valve port Made of acrylonitrile butadiene styrene (ABS)