Pentair 2" Top Mount, Clamp on Complete Valve . Fits the Tagelus TA sand filters. These backwash valves have a corrosion resistant PVC body with a Noryl heavy-duty diverter and large, one piece handle for trouble free operation. The six-position positive lock diverter is equipped with a special winterizing position. These top mounted Multi-port valves are designed for maximum sand filter backwash performance and precise water flow. Diameter: 8.35"