The Valve,check, cataloged under National Stock Number 4820-01-659-9016, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Marine Air Systems Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-659-9016 |
| Primary Part Number | 335225 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Marine Air Systems Inc |
| 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 |
NSN 4820-01-659-9016 is a Valve,check, manufactured by Marine Air Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-659-9016 has 2 manufacturer part numbers on file: 335225 (Marine Air Systems Inc), 290335225 (Marine Air Systems Inc).
Key specifications for 335225: Special Features: 1/2 INCH FPT (REDUCED PRESS ZONE) IN; Part Name Assigned by Controlling Agency: BACK FLOW PREVENTER; End Item Identification: CHILLED WATER COMPONENT. 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.