The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-287-0422, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-287-0422 |
| Primary Part Number | 40XL-7 1IN-125PSI |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| Second End Nominal Pipe Size Accommodated | 1.000 INCHES IN |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Opening Pressure Setting | ERR-060 |
| First End Connection Type | THREADED INTERNAL PIPE |
| First End Nominal Pipe Size Accommodated | 1.000 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC STEM |
| Media for Which Designed | WATER, FRESH |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| 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 |
|---|---|
| 40XL-7 1IN-125PSI | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| 40XL-7 1IN-125PSI PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 40XL-7 1IN | C/1 Advisory reference — outside the item-of-supply concept The Electric Heater Co Dba Hubbell Electric Heater Co. |
| 40XL-7 | C/1 Advisory reference — outside the item-of-supply concept Watts Regulator Company |
NSN 4820-01-287-0422 is a Valve,relief,pressure and Temper, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-287-0422 has 2 manufacturer part numbers on file: 40XL-7 1IN-125PSI (The Electric Heater Co Dba Hubbell Electric Heater Co.), 40XL-7 1IN-125PSI (Watts Regulator Company).
Key specifications for 40XL-7 1IN-125PSI: First End Thread Direction: RIGHT-HAND; Temp Rating: 210.0 FAHRENHEIT DEGF; Second End Relationship with First End: NOT IDENTICAL; Body Style: ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS. 14 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.