Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3900023 found under Siphon Sewage Dosing Tank by Evac North America Inc. The National Stock Number assigned to this part is 4630014811402, and the Federal Supply Class is 4630 Sewage Treatment Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3900023.