The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-425-3838, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aalberts Integrated Piping Systems Americas, Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-425-3838 |
| Primary Part Number | 38-101-01 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aalberts Integrated Piping Systems Americas, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK, BOTTOM GUIDED |
| First End Thread Series Designator | NPTF |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 212.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Nominal Pipe Size Accommodated | 0.250 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC SILICONE FLOW CONTROL DEVICE |
| Media for Which Designed | WATER, FRESH |
| Absolute Pressure Setting | 125.0 |
| First End Nominal Thread Size | 0.250 INCHES IN |
| 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 |
|---|---|
| 38-101-01 PRIMARY | Aalberts Integrated Piping Systems Americas, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 18-101-01 | 5/9 Secondary reference Aalberts Integrated Piping Systems Americas, Inc. |
NSN 4820-01-425-3838 is a Valve,vacuum Breaking, manufactured by Aalberts Integrated Piping Systems Americas, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-3838 has 1 manufacturer part number on file: 38-101-01 (Aalberts Integrated Piping Systems Americas, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6515-01-599-8876. Verify interchangeability with system specifications before substitution.
Key specifications for 38-101-01: Flow Control Device: DISK, BOTTOM GUIDED; First End Thread Series Designator: NPTF; First End Thread Direction: RIGHT-HAND; Temp Rating: 212.0 FAHRENHEIT DEGF. 16 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.