The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-437-0233, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4520-01-437-0233 |
| Primary Part Number | PL9002E-02-C |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Shape | ROUND |
| Cross-Sectional Diameter | 1.6250 INCHES NOMINAL IN |
| 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 |
|---|---|
| PL1133-00-DRI FIND NO. 16 | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| PL9002E-02-C PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| PL1133-00-DR1 | D/9 Drawing number reference only Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
NSN 4520-01-437-0233 is a Pipe,air Conditioning-Heating, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-437-0233 has 2 manufacturer part numbers on file: PL1133-00-DRI FIND NO. 16 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil), PL9002E-02-C (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
2 possible matches (shared part number, not a government interchangeability claim): 4520-01-437-0262, 4520-01-437-1408. Verify interchangeability with system specifications before substitution.
Key specifications for PL9002E-02-C: Shape: ROUND; Special Features: NAVY W/S CODE JK WASP CLASS LHD; Cross-Sectional Diameter: 1.6250 INCHES NOMINAL IN. 2 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.