Double Back Check Fill Valve – 1 1/4″ NPT Inlet – 3/4″ ACME Outlet Double Back Check Filler Valve ASME Tank Applications 1-1/4″MNPT X 1-3/4″ACME With Cap & Strap Double Back Check Fill Valve - 1 1/4" NPT Inlet - 3/4" ACME Outlet quantity Add to cart Add to Quote SKU: RBTFILLVALVE Categories: LP/Propane + CNG Valves, LP/Propane + CNG Valves