Description
Transport high-output cold water wash systems to distant job locations. The Simpson 4200 PSI 4.0 GPM Gas trailer package delivers complete wash mobility without local utility access. A 150-gallon onboard poly tank feeds a commercial Honda GX390 engine. The dynamic liquid weight demands a full-size truck for highway towing.
A 2000-pound leaf-spring axle supports the heavy rectangular steel tube chassis. The powder-coated frame incorporates DOT lighting, safety chains, and an integrated jack stand. A commercial CAT triplex pump connects directly to the Honda gas engine. A rear-mounted manual hose reel stores high-pressure line without kinks. Heavy steel fenders protect the tank from highway road gravel.
Trailer System Feature Highlights
Municipal crews clean remote park pavilions and highway bridges without water hookups. The large poly tank supports extended washing runs between fill stops.
- Industrial 389cc Honda engine generates reliable shaft power on remote jobsites
- Direct-drive CAT triplex pump supplies 4200 PSI at 4.0 GPM cleaning capacity
- Onboard 150-gallon poly tank provides clean water reserves for field work
- Integrated steel hose reel manages 100 feet of high-pressure fluid line
- DOT-certified trailer suspension allows safe legal transport on interstate roads
- Five quick-connect spray nozzles adjust stream pattern spread for custom tasks
- Heavy-duty 100-foot wire-braided hose extends operator reach away from trailer
Trailer Dyno Bench Telemetry
Engine dyno analysis shows consistent 3480 RPM rotation under full 4200 PSI working resistance. Fluid flow stabilizes at 3.95 GPM through the included 0.040 spray tip. Sump oil temperature reaches 184°F after 3 continuous hours of trailer run time. Engine fuel consumption registers 0.91 GPH. Acoustic testing indicates 91 dBA at 5 meters from the trailer tongue.
Jobsite Demands Operational Notes
You back this compact trailer into remote jobsite alleys using truck mirrors. The balanced tongue weight simplifies manual hitch hookups on flat shop floors. Do not pull this loaded trailer with small unrated passenger vehicles. Sudden stops cause unbaffled tank water to surge forward and jackknife light tow vehicles.
- Check trailer tire air pressure and wheel lug nuts before highway trips
- Clean the tank outlet water filter screen to prevent pump head blockage
- Drain the water tank and pump head prior to sub-freezing winter storage
Warranty Statement Manifest Details
Simpson provides a 3-Year Honda engine warranty, 5-Year CAT pump warranty, and 1-Year trailer chassis warranty. The shipment includes the highway trailer, 150-gallon tank, 100-foot hose, reel, spray gun, lance, 5 spray tips, and DOT registration paperwork.






