Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DLS-1 4IN150PSI found under Diaphragm Valve Fla by Leslie Controls Inc. The National Stock Number assigned to this part is 4820013193613, 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 DLS-1 4IN150PSI.