The Disk,valve, cataloged under National Stock Number 4820-01-232-8453, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-232-8453 |
| Primary Part Number | 1037730-SS |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| 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 |
|---|---|
| 1037730-SS PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| SA-909C20 | D/9 Drawing number reference only Watts Regulator Company |
| SA-909C37 | 5/9 Secondary reference Watts Regulator Company |
NSN 4820-01-232-8453 is a Disk,valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-232-8453 has 1 manufacturer part number on file: 1037730-SS (Watts Regulator Company).
Key specifications for 1037730-SS: End Item Identification: REDUCED PRESSURE PRINCIPLE BACK FLOW PREVENTER. 0 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.