1 1/4″ NPT ASME – 1000 Gallon 1000 Gallon Relief 250 PSI Relief 1 1/4″ Thread Size 1 1/4" NPT ASME - 1000 Gallon quantity Add to cart Add to Quote SKU: RELIEF1000 Categories: LP/Propane + CNG Valves, LP/Propane + CNG Valves