Mazzei 484A-PP 3/4" MNPT Injector **Only Online Authorized Distributor of Mazzei Ag Injectors** Model 484A-PP Injector Unit Inlet & Outlet: 3/4" MNPT Suction Port: 1/4" Barb; 1/4" MNPT Thread Please visit www.mazzei.net/venturi_injectors/ for more detailed information