The Breaker,vacuum,flush Valve, cataloged under National Stock Number 4510-01-528-1659, is classified within Federal Supply Class 4510 (Plumbing Fixtures and Accessories) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Low Temp Industries, Inc. Dba Low Temp Industries Inc. Government technical data includes 5 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4510-01-528-1659 |
| Primary Part Number | 519900 |
| Item Name | Breaker,vacuum,flush Valve |
| FSC / FSG | 4510 / 45 — Plumbing Fixtures and Accessories |
| Manufacturer | Low Temp Industries, Inc. Dba Low Temp Industries Inc |
| Status | ACTIVE |
| Outlet Connection Size | 1/2 INCH IN |
| Inlet Connection Type | THREADED EXTERNAL PIPE |
| Material | COPPER ALLOY |
| Inlet Connection Size | 1/2 INCH IN |
| Outlet 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 |
|---|---|
| 228A-1/2IN | Watts Regulator Company (USA) |
| 519900 PRIMARY | Low Temp Industries, Inc. Dba Low Temp Industries Inc (USA) |
NSN 4510-01-528-1659 is a Breaker,vacuum,flush Valve, manufactured by Low Temp Industries, Inc. Dba Low Temp Industries Inc, classified under FSC 4510, Plumbing Fixtures and Accessories. Status: active.
NSN 4510-01-528-1659 has 2 manufacturer part numbers on file: 228A-1/2IN (Watts Regulator Company), 519900 (Low Temp Industries, Inc. Dba Low Temp Industries Inc).
1 possible match (shared part number, not a government interchangeability claim): 4240-01-614-8693. Verify interchangeability with system specifications before substitution.
Key specifications for 519900: Outlet Connection Size: 1/2 INCH IN; Inlet Connection Type: THREADED EXTERNAL PIPE; Special Features: WATTS REGULATOR COMPANY SERIES 288A HOT OR COLD WATER ANTI-SIPHON VACUUM BREAKER. HAS BRASS BODY. FULL SIZE ORIFACE FOR MAXIMUM FLOW. LIGHTWEIGHT DISC ASSEMBLY PREVENTS SPILLING UNDER ALL RATES OF FLOW. MAXIMUM TEMPERATURE 180 DEGREES FARENHEIT AT 125 PSI WORKING PRESSURE. A; End Item Identification: CONVEYOR. 5 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.