Wheeler-Rex 38300 300 PSI Electric Hydrostatic Test Pump
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The Wheeler-Rex 38300 is a new, electric-motor-driven hydrostatic test pump manufactured by Wheeler Mfg. (a division of Rex International USA, Ashtabula, OH), designed for pressure testing water lines, plumbing systems, heating systems, and other piping assemblies. The pump features a die-cast aluminum pump body, an integrated pressure gauge, a pressure relief/bypass valve, and standard garden hose (GHT) inlet connection visible in the product photo, with a 3-prong 120V AC power cord for standard outlet operation. It is purpose-built for contractors and plumbers who need to hydrostatically test pipe systems to verify integrity — the motor drives a positive-displacement plunger pump that builds and holds test pressure while the bypass valve protects against over-pressurization. Grainger cross-references this unit under item number 6GDV5, confirming OEM identity. The unit ships new in original Wheeler-Rex factory carton.
Product Specifications
| Manufacturer | Wheeler-Rex (Rex Int'l USA) |
| Part Number | 38300 |
| Product Type | Electric Hydrostatic Test Pump |
| Power Source | 120V AC, 60 Hz, single phase |
| Outlet Connection | 1/4 in NPT (male) |
| Inlet Connection | 3/4 in GHT (garden hose thread) |
| Max Test Pressure | 300 PSI |
| Pump Body Material | Die-cast aluminum |
| Includes Pressure Gauge | Yes |
| Includes Bypass/Relief Valve | Yes |
| Condition | New |
| Country of Manufacture | USA |
| Manufacturer Location | Ashtabula, OH 44005 |
| Cross Reference (Grainger) | 6GDV5 |