The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-574-8292, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-574-8292 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| End Connection Quantity | 2 |
| Media for Which Designed | WATER, FRESH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 0530-013-000 | 3/9 Design control — primary reference Acorn Engineering Company Dba Whitehall Manufacturing Co |
| 0540-013-000 | 5/9 Secondary reference Acorn Engineering Company Dba Whitehall Manufacturing Co |
| 2998-012-001 ITEM 9 | 5/9 Secondary reference Acorn Engineering Company Dba Whitehall Manufacturing Co |
NSN 4820-01-574-8292 is a Valve,vacuum Breaking, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-574-8292: End Connection Quantity: 2; Part Name Assigned by Controlling Agency: VACUUM BREAKER 1/2 INCH THREADS IN; End Item Identification: 4510-01-574-8140 FLUSH CONTROL ASSY, VACUUM TOILET UNIT; OVERHAUL/AVAILABILITY DDG62; Media for Which Designed: WATER, FRESH. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.