The Valve,vent-Check, cataloged under National Stock Number 4820-01-475-7997, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Robert H Wager Co Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-475-7997 |
| Primary Part Number | 1750FB-5.0IN |
| Item Name | Valve,vent-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Robert H Wager Co Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Nominal Pipe Size Accommodated | 5.000 INCHES FIRST END IN |
| Flange Face Design | PLAIN FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Nominal Outside Diameter | 10.000 INCHES FIRST END IN |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | COPPER FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 1750FB-5.0IN PRIMARY | Robert H Wager Co Inc (USA) |
| 5-1750FB BRZ COPPER FLT SS SCR | Robert H Wager Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 1750-F | 5/1 Secondary reference Robert H Wager Co Inc |
NSN 4820-01-475-7997 is a Valve,vent-Check, manufactured by Robert H Wager Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-475-7997 has 2 manufacturer part numbers on file: 1750FB-5.0IN (Robert H Wager Co Inc), 5-1750FB BRZ COPPER FLT SS SCR (Robert H Wager Co Inc).
Key specifications for 1750FB-5.0IN: Flow Control Device: BALL; Flange Shape: ROUND WITH HOLES FIRST END; Nominal Pipe Size Accommodated: 5.000 INCHES FIRST END IN; Flange Face Design: PLAIN FIRST END. 12 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.