The Valve Assembly,backflow Prevente, cataloged under National Stock Number 4820-01-324-3716, 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 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-324-3716 |
| Primary Part Number | 1 1/4LF909M1-QT-S |
| Item Name | Valve Assembly,backflow Prevente |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| General Characteristics Item Description | INCLUDES TWO GATE VALVES,TWO CHECK VALVES,RELIEF VALVE; BRONZE BODY,RUBBER CHECK AND RELIEF VALVE; VALVE SIZE 1.250IN.;TEMP TO 140.0DEG F; 175 PSI 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 |
|---|---|
| 1 1/4LF909M1-QT-S PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 909M1QT-S 1 1/4 | 5/9 Secondary reference Watts Regulator Company |
| 909S 1-1/4IN | 5/9 Secondary reference Watts Regulator Company |
NSN 4820-01-324-3716 is a Valve Assembly,backflow Prevente, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-324-3716 has 1 manufacturer part number on file: 1 1/4LF909M1-QT-S (Watts Regulator Company).
Key specifications for 1 1/4LF909M1-QT-S: General Characteristics Item Description: INCLUDES TWO GATE VALVES,TWO CHECK VALVES,RELIEF VALVE; BRONZE BODY,RUBBER CHECK AND RELIEF VALVE; VALVE SIZE 1.250IN.;TEMP TO 140.0DEG F; 175 PSI IN. 1 specification is 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.