National Stock Number
4320-01-555-8318
National Stock Number (NSN) 4320-01-555-8318, or NIIN 015558318, (water supply system,automatic) was assigned September 14, 2007 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 19731. [AN OPERATING ASSEMBLY DESIGNED TO STORE AND DELIVER WATER UNDER PRESSURE. IT AUTOMATICALLY RAISES WATER AS NEEDED, TO REPLENISH THE SUPPLY AND MAINTAIN THE PRESSURE AGAINST INTERMITTENT USE. IT CONSISTS ESSENTIALLY OF A TANK, PRESSURE; SWITCH, PRESSURE; PUMP; PRIME MOVER; CHECK VALVE; AIR VOLUME CONTROL VALVE AND NECESSARY PIPING CONNECTIONS.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4320015558318 does not contain precious metals.
This information was last updated on Aug 01, 2025.