This is the complete wet end for the Waterway Executive 56 Frame and Mustang pumps. Has a 2" inlet and 2" side discharge. Undocumented changes to the 56 frame volute (Waterway part number 315-1820) have made it difficult to identify whether the current replacement part will work with an existing pump. Current volutes will not interchange with older ones. If replacement of the volute is necessary, please replace the entire wet end. Identical to: 310-1740 , 310-1740B , 310-1740V , 310-2740 , 315-1220 , 315-1220B , 600162 , 614311 , 806105062567 , 806105064875 , WW3101740 , 5039-440