# NSN 4820-01-643-9507: Valve, Vacuum Breaking

NSN 4820-01-643-9507 (also written 4820016439507; NIIN 01-643-9507) is a valve, vacuum breaking in Federal Supply Class 4820, Valves, Nonpowered. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 4820-01-643-9507 (4820016439507)
- NIIN: 01-643-9507 (016439507)
- Item name: VALVE,VACUUM BREAKING
- Federal Supply Class: [FSC 4820 Valves, Nonpowered](https://nsnexplorer.com/fsc/4820/)
- Federal Supply Group: [FSG 48](https://nsnexplorer.com/group/48/)
- Acquisition method suffix code: AMSC Q: the government lacks adequate data or rights, but breakout to competition is expected. (observed 2026-10-28)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ACLG | FIRST END NOMINAL PIPE SIZE ACCOMMODATED | INCHES 1.0 |
| MEDA | MEDIA FOR WHICH DESIGNED | LOCATION NOT OTHERWISE SPECIFIED WATER, FRESH |
| AGAV | END ITEM IDENTIFICATION | VALVE, PRESSURE |
| AAQL | BODY STYLE | — |
| ADQU | FLOW CONTROL DEVICE | DISK, TOP GUIDED |
| ACKM | FIRST END CONNECTION TYPE | THREADED INTERNAL PIPE |
| ABJH | TEMP RATING | FAHRENHEIT 180.0 |
| FEAT | SPECIAL FEATURES | MAX WORKING PRESSURE: 125PSI |
| MATT | MATERIAL | BODY COPPER ALLOY |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | HOT OR COLD WATER ANTI-SIPHON VACUUM BREAKER |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 0792040 | 79227 | WATTS REGULATOR COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1 LF288AM4 | 79227 | WATTS REGULATOR COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-26 | [SPE7M126V108M](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016439507) | VALVE, VACUUM BREAKI | KAMPI COMPONENTS CO INC | $5,992.92 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820016439507&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016439507
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4820-01-643-9507/
JSON: https://nsnexplorer.com/api/nsn/4820-01-643-9507.json