ST052120AF40C - 12" Eaton Model 52 Duplex Basket StrainerPart number ST052120AF40C is a 12 inch size cast iron Eaton model 52 duplex basket strainer. The model 52 uses two butterfly valves to divert flow from one basket chamber to the next. This minimizes pressure loss and allows for easy cleaning of one basket while the strainer continues running. Perfect for a range of applications like wastewater and cooling towers, Eaton's model 52 strainer also features a pleated basket design, positive shutoff,