Description
De-water flooded bridge footings, quarry excavations, and canal breaches fast. The Honda 4 Inch Trash Pump clears massive liquid volumes across harsh construction jobsites. A 389cc commercial Honda GX390 engine turns an abrasive-resistant conical impeller. The large 4-inch hose lines require mechanical clamping to avoid dislodging under high discharge pressures.
Heavy-duty tubular steel forms the perimeter roll-cage frame, finished with durable red powder coat. A commercial 389cc Honda GX390 OHV gas engine provides shaft power through a forged steel crankshaft. Conical cast-iron impellers and volutes resist abrasion wear from suspended sand and coarse gravel up to 1.2-inch diameter. Silicon carbide mechanical seals run in an oil bath. Rubber mounts dampen engine vibration.
Commercial Trash Pump Mechanical Specs
Excavation crews clear dirty stormwater from jobsite trenches without electrical line hookups. The wide 4-inch discharge neck allows swift drainage of muddy gravel runoff.
- Commercial 389cc Honda engine delivers reliable shaft torque across long dewatering shifts
- Conical cast-iron impeller moves 433 GPM while passing suspended solids up to 1.2-inch diameter
- Die-cast aluminum casing cuts unit weight for fast jobsite transport and loading
- Tubular steel roll-cage shields engine and pump components from crushing worksite impacts
- Silicon carbide mechanical shaft seal resists wear from abrasive sand particles
- Standard 4-inch NPT suction and discharge ports hook straight to commercial contractor hoses
- Rubber vibration isolators absorb engine pulses to stop pump walking on concrete
Engine Dyno De-Watering Telemetry
Dynamometer bench testing demonstrates the Honda engine maintains 3550 RPM under a 25-foot dynamic discharge head. Fluid flow stabilizes at 395 GPM through 50 feet of 4-inch lay-flat hose. Crankcase oil temperature reaches 186°F after 3 continuous hours of full-throttle operation. Fuel consumption measures 0.92 GPH. Sound telemetry indicates 89 dBA at 5 meters distance.
Worksite Performance Practical Notes
You lift this heavy pump across jobsites using the tubular steel roll cage. The broad footprint keeps the pump upright on muddy ditch banks. Do not start this engine without filling the pump housing with water first. Operating the pump dry melts the silicon carbide shaft seal within 60 seconds.
- Fill the pump priming chamber with clean water before pulling the starter cord
- Inspect the suction hose gasket for airtight seals to prevent vacuum loss
- Drain the pump casing plug before winter storage to prevent freeze cracking
Certified Warranty Complete Manifest
Honda provides a 3-Year limited commercial warranty covering the pump and GX390 engine. The carton contains the 4-inch trash water pump, steel roll cage, 4-inch hose couplings, suction strainer screen, and complete operator manuals.
