Pentair 261173 1-1/2-Inch Multiport Valve Replacement Pool/Spa D.E. and Sand Filter Multiport valve replacement Fits Pentair Quad pool and spa D.E. filter models QUAD60, QUAD80, QUAD100 Also fits Pentair Triton II and HD side mount pool/spa sand filters PVC body and special winterizing position; six-position, positive-lock operation Measures 1-1/2-Inch