Pentair 261050 2-Inch HiFlow Valve with Plumbing Replacement Pool/Spa D.E. and Sand Filter Hiflow valve with plumbing replacement Fits Pentair Quad pool and spa D.E. filter models QUAD60, QUAD80, QUAD100 Also fits Pentair Triton C, II and HD side mount pool/spa sand filters Measures 2-inch by 7-1/2-inch centerline Measures 2-inch