The Valve,check, cataloged under National Stock Number 4820-01-199-7891, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Itw Food Equipment Group Llc Dba Gaylord Industries (CAGE 09051); Watts Regulator Company (CAGE 79227) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-199-7891 |
| Primary Part Number | 288A 1IN |
| Item Name | Valve,check |
| 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 |
|---|---|
| N-4100 PIECE 17 1IN MODEL 288A | Itw Food Equipment Group Llc Dba Gaylord Industries (USA) |
| 288A 1IN PRIMARY | Watts Regulator Company (USA) |
| 288A 1IN | Itw Food Equipment Group Llc Dba Gaylord Industries (USA) |
| Reference | Meaning |
|---|---|
| 305 | 5/9 Secondary reference Itw Food Equipment Group Llc Dba Gaylord Industries |
| 288A 1.00IN | 5/9 Secondary reference Itw Food Equipment Group Llc Dba Gaylord Industries |
| N-4100 | D/9 Drawing number reference only Itw Food Equipment Group Llc Dba Gaylord Industries |
NSN 4820-01-199-7891 is a Valve,check, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-199-7891 has 3 manufacturer part numbers on file: N-4100 PIECE 17 1IN MODEL 288A (Itw Food Equipment Group Llc Dba Gaylord Industries), 288A 1IN (Watts Regulator Company), 288A 1IN (Itw Food Equipment Group Llc Dba Gaylord Industries).
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.