The Valve,check, cataloged under National Stock Number 4820-01-554-8697, 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 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-554-8697 |
| Primary Part Number | 009M2S 1.5IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Valve Size | 1.500 INCHES IN |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 009M2S 1.5IN PRIMARY | Watts Regulator Company (USA) |
| 11/2 009M2S | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 009M2S | 5/1 Secondary reference Watts Regulator Company |
NSN 4820-01-554-8697 is a Valve,check, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-554-8697 has 2 manufacturer part numbers on file: 009M2S 1.5IN (Watts Regulator Company), 11/2 009M2S (Watts Regulator Company).
Key specifications for 009M2S 1.5IN: Valve Size: 1.500 INCHES IN; Special Features: SERIES 009 FEATURES TWO IN-LINE, INDEPENDENT CHECK VALVES, CAPTURED SPRINGS AND REPLACEABLE CHECK SEATS WITH AN INTERMEDIATE RELIEF VALVE; DESIGNED TO PROTECT POTABLE WATER SUPPILES AND TO PREVENT HEALTH HAZARD CROSS CONNECTIONS IN PIPING SYSTEMS; Part Name Assigned by Controlling Agency: REDUCED PRESSURE ZONE ASSEMBLY; End Item Identification: MISC PARTS AUXILIARY SYSTEMS LCS1. 3 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.