This valve is used on Top Mount Sand Filters and Tagelus models except TA100. Heavy-duty diverter, large one-piece handle for trouble free operation and special winterizing plug. 100% Factory tested. Pentair�s TA (Tagelus) sand filter 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.