The Water Heater Relief Valve, cataloged under National Stock Number 2540-01-552-9651, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-552-9651 |
| Item Name | Water Heater Relief Valve |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| WH3 | 3/9 Design control — primary reference Raritan Engineering Company Inc |
NSN 2540-01-552-9651 is a Water Heater Relief Valve, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 7310-01-569-0225, 6105-01-592-3075. Verify interchangeability with system specifications before substitution.
Key specifications for 2540-01-552-9651: End Item Identification: 49'BUSL,SICR NUMBER 519;P/N WH3. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.