A trailer-mounted pressure washer exists to solve one problem: the equipment has to go where the work is, and there may not be water or power when it gets there.
We build and supply mobile and trailer-mounted systems for fleets, contractors, and facilities across Northeast and North Central Florida — configured around the job rather than picked off a shelf.
Drive. Gas or diesel engine for full independence, or electric for quiet indoor and well-powered sites.
Heat. Cold water for general work; diesel-fired, LP, or natural-gas hot water where grease and oil are involved. Hot water on a trailer is the configuration most fleets land on.
Onboard water. A tank sized to your runtime — and this is where the arithmetic matters. Tank capacity divided by flow rate gives you run time: a 200-gallon tank feeding a 4 GPM machine runs about 50 minutes before you refill. If the work needs an hour of continuous washing, a 200-gallon tank is the wrong answer no matter how good the machine is.
Guns and reels. Single-gun for one operator, or multi-gun with hose reels for two or three operators working one job — which changes the pump and burner spec, not just the plumbing.
Burner fuel and tank, chemical injection and metering, hose reels, lighting for night work, and trailer brakes and road equipment as the weight requires.
Water supply options. Onboard tank only; tank plus a float valve to refill from a pressurized supply; or a bulk tank and transfer pump for high-volume operations.
Start with what has to get clean and how fast, then work backward:
Get those six right and the trailer layout follows. Skip them and you own an expensive machine that runs out of water at minute fifty.
Mobile washing doesn’t remove the environmental question — it moves it. Florida DEP’s guidance for mobile vehicle and equipment washing is explicit that wash water carries oil, grease, suspended solids, heavy metals, and detergents, and that it has to be managed rather than discharged:
For operations washing at customer sites, this is also a contract question — who owns the runoff. We’ll help you plan containment and chemistry before the trailer is built, because retrofitting it afterward costs more than specifying it up front.
Heat, humidity, hard water, and year-round operation shape the spec. Hot water machines on trailers need burner service schedules that keep up with heavy duty, water softening where scale is severe, and chemistry that doesn’t degrade sitting in a drum on a trailer through a Florida summer. Our cleaning chemistry is formulated to hold up in storage.
We service what we sell — burner, coil, pump, and unloader work — onsite or drop-off at our Jacksonville shop. Trailer systems are also worth putting on a tracked maintenance schedule: they run hard, they sit outdoors, and they’re usually the machine you can least afford to lose.
How much water do I need on board?
Divide tank capacity by flow rate for runtime: 200 gallons at 4 GPM is about 50 minutes. Then decide whether your work is continuous or intermittent, and whether a float valve can refill from a supply at the site. Sizing the tank to the job matters more than sizing it as large as possible.
Can a trailer system run two operators at once?
Yes, with the right configuration — but two guns means the pump, burner, and water supply all have to be sized for combined flow, not one gun’s flow. Tell us the crew size and we’ll spec it that way rather than adding a second gun to a single-gun machine.
Do you build custom trailers or sell standard models?
Both. Custom is common in this category because the tank, reel, burner, and gun configuration depend on the work. Bring us the job and we’ll configure it.
Is a trailer system still subject to wash-water rules?
Yes. Mobile washing doesn’t exempt the runoff — Florida DEP guidance applies to mobile vehicle and equipment washing specifically, and discharge to a sanitary sewer requires prior approval from the wastewater utility.
Can you service a trailer system at our yard?
Yes — onsite across Duval, Clay, St. Johns, Putnam, Marion, Alachua, and Columbia counties, or drop-off at our Jacksonville shop.
Tell us what you clean, how often, where the water comes from, and how many operators will be running guns. We’ll configure the trailer and chemistry around that.
Call (904) 693-2155 or request a quote. Sun Pro Supply is the exclusive authorized Hotsy dealer for Duval, Clay, St. Johns, Putnam, Marion, Alachua, and Columbia counties, and an authorized retail and repair center for Ramteq and other major commercial brands. See also commercial pressure washers and our buying guide.
