Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 398VP-12-31-54 found under Controller Chlorine Water Purifi by Rosemount Analytical Inc. The National Stock Number assigned to this part is 4610015460782, and the Federal Supply Class is 4610 Water Purification Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 398VP-12-31-54.