The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-241-4871, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-241-4871 |
| Primary Part Number | 288A 1/4IN. |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flow Control Device | DISK, BOTTOM GUIDED |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Temp Adjustability | ADJUSTABLE |
| Surface Treatment | CHROMIUM OUTSIDE |
| Material | COPPER ALLOY BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 288A 1/4IN. PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 8524-2501 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-241-4871 is a Valve,vacuum Breaking, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-241-4871 has 1 manufacturer part number on file: 288A 1/4IN. (Watts Regulator Company).
Key specifications for 288A 1/4IN.: Flow Control Device: DISK, BOTTOM GUIDED; Temp Rating: 210.0 FAHRENHEIT DEGF; Temp Adjustability: ADJUSTABLE; Special Features: ANGLED FLOW; 125 LBS WORKING PRESSURE; CENTER OF ORIFICE TO TOP 1-3/16IN. AND TO BOTTOM 1-11/16IN.; TOP DIA 1.688 LBS. 5 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.