# NSN 4820-01-558-4422: Valve, Safety Relief

NSN 4820-01-558-4422 (also written 4820015584422; NIIN 01-558-4422) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4820-01-558-4422 (4820015584422)
- NIIN: 01-558-4422 (015584422)
- Item name: VALVE,SAFETY RELIEF
- 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 R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. (observed 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 110.0 |
| AGAV | END ITEM IDENTIFICATION | 430 GAL., 65KW, 440/3/60 - 86A, WATER HEATER FOR DDG90 THRU 101 |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC OR MANUAL |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 210.0 |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE WATER, FRESH |
| STYL | STYLE DESIGNATOR | — |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | 1 INCH RELIEF VALVE |
| MATT | MATERIAL | BODY BRONZE |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 17745 PC NO. 46 | 19857 | THE ELECTRIC HEATER CO DBA HUBBELL ELECTRIC HEATER CO. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| HSRV-6 | 19857 | THE ELECTRIC HEATER CO DBA HUBBELL ELECTRIC HEATER CO. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| HSRV-6-110 | 19657 | LOUIS C EITZEN COMPANY INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| HSRV-6-110 | 19857 | THE ELECTRIC HEATER CO DBA HUBBELL ELECTRIC HEATER CO. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820015584422&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015584422
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- 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/4820-01-558-4422/
JSON: https://nsnexplorer.com/api/nsn/4820-01-558-4422.json