1 NPT Inlet / Outlet (Fits Non-AD with a 3.70 diameter) 1-12 UNF 3/4" Flow (Cast Iron) APPLICATION: 40502/5/10/30 P, 40510 A, 40510 D, 40510/30 W, 40810/30 P-DV, 40910/30 P, 40910/30 W