Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RV-1223F 1 4IN AWR 5T75PSI found under Valve Regulating Fl by Leslie Controls Inc. The National Stock Number assigned to this part is 4820011934663, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RV-1223F 1 4IN AWR 5T75PSI.