Truck-Mounted Pressure Washing Setups

Truck-Mount vs Trailer: When to Choose Each

Trailers are ideal for service stations, property yards, or operations serving a concentrated service area. You can leave the rig stationed and rotate crews through.

Truck-mounts are ideal for mobile, multi-location services (exterior home cleaning, commercial building chains, route-based contracts) where you need the rig with you constantly.

Key Advantages of Truck-Mounts

Mobility: Move from job to job without hitching/unhitching. One vehicle handles all transport and work.

Professional appearance: A branded truck-mount looks more established than a trailer; clients perceive you as professional.

No parking/storage headaches: Your truck parks at job sites or in a compact lot. Trailers need space at an office or yard.

Integrated hot water: Truck-mounts easily accommodate 200k–500k BTU heaters. Adding hot water to a trailer requires significant engineering.

Faster deployment: Arrive, connect one gun, and work. No setup time.

Trade-Offs

Cost: A truck-mount costs $15,000–$45,000+ installed. A comparable trailer is $8,000–$18,000.

Truck burden: You’re maintaining a full vehicle plus the rig. Trailer rigs separate concerns (truck is personal; trailer is work-specific).

Payload limits: Even a 1-ton truck beds out at 2,000–2,500 lbs payload. A single-axle trailer can carry 3,500+ lbs.

Heat in cab: Mounted systems generate warmth in hot climates; trailers dissipate heat more easily.

Truck-Mount Installation Methods

Slide-In Skid Mounted

A complete preassembled skid (tank, pump, hose reel, plumbing) fits into a truck bed, held by corner brackets and tie-downs.

Advantages:

• Removable; can swap between trucks or store seasonally
• Lower installation cost ($2,000–$5,000 labor)
• Easier to maintain in a shop
• Can downgrade truck if rig outlives it

Disadvantages:

• Skid sits high in the bed; center of gravity is higher (towing stability affected if coupled with trailer)
• Payload limited to truck bed capacity
• Uneven weight distribution if tank is large

Best for: Operators running one vehicle, single-person crews, seasonal/part-time work.

Dedicated Frame-Mounted

The tank, pump, and all systems are bolted to the truck frame, becoming a permanent installation.

Advantages:

• Lower center of gravity (tank mounted low to frame)
• Better weight distribution
• More integrated appearance (cleaner-looking truck)
• Better for dual-pump setups and hot water units

Disadvantages:

• Permanent; selling the truck includes the rig (or costly removal)
• More labor-intensive installation ($4,000–$8,000+)
• Harder to service (must access under truck)
• If the truck needs major repairs, the rig is in the way

Best for: Professional fleets with long truck lifecycles, dedicated single-purpose vehicles.

Hot Water Pressure Washing Trucks

Hot water dramatically improves cleaning power and speed, especially on grease, oils, and sticky buildup.

Heating Methods

Diesel Burner (most common):

• Separate 15–30 gallon diesel tank under truck
• Heat exchanger warms water to 120–180°F
• Cost: $6,000–$12,000 installed, plus $0.50–$1.00/gallon diesel fuel
• Output: 100k–500k BTU depending on model
• Lifespan: 10–15 years with maintenance

Propane Burner:

• 20–50 lb propane tank mounted on truck
• Direct flame heats water
• Cost: $5,000–$10,000 installed, plus $15–$25/refill (every 20–40 hours)
• Output: 100k–300k BTU typical
• Advantage: cheaper fuel initially, easier to source
• Disadvantage: more frequent refills on high-use rigs

Electric Immersion Heater:

• Uses truck’s auxiliary power/generator
• Cost: $2,000–$4,000
• Output: Limited (30k–50k BTU equivalent)
• Only viable if you have a generator running; drains battery if truck idle

Return on Investment: Hot Water Economics

Hot water heating adds $1.00–$2.00 per job in fuel costs but lets you charge $0.05–$0.15 more per square foot. On a 2,000 sq ft house wash normally charged at $0.50/sqft ($1,000), you can charge $1,100–$1,300 with hot water.

At 10 jobs per week, added revenue = $1,000–$3,000/week, minus $100–$150 in fuel = net $5,000–$15,000 more per month for a single truck. ROI is typically 6–12 months.

Tank Placement and Weight Distribution

Tank Position: Mount the tank as low and centered as possible. A low center of gravity improves towing stability and ride quality.

Axle Alignment: Ideally, 50–60% of the rig weight sits ahead of the truck’s rear axle, maintaining balance. Too much weight over the rear wheels causes poor handling and rapid tire wear.

Weight Example (1/2-ton truck, 3,500 lbs payload):

• 500 gal water tank (4,150 lbs) exceeds payload alone
• Solution: Mount a 300–400 gal tank instead
• Add pump/engine (250 lbs), hose reel (150 lbs), plumbing (100 lbs)
• Total: ~1,200 lbs, leaving room for operator, fuel, misc.

A 3/4-ton or 1-ton truck accommodates larger tanks (500–700 gallons) without overload.

Plumbing and Electrical Integration

Quick-Connect Outlets

Install 2–3 quick-connects on the truck bed rails:

• One high-pressure discharge (reel feed)
• One fresh water supply inlet
• One drain outlet (collection sump)

This allows operators to connect and refill without breaking seals or spilling.

Fresh Water Supply

Truck-mounts need frequent refills (a 400 gal tank + continuous use = refill every 2–4 hours).

Refill Options:

• Carry 50–100 foot supply hose, tap nearby hydrants or spigots
• For high-volume routes, install onboard fill systems at your garage/yard and top off between jobs
• Use a 5-gallon jug fill-up system if tap access is unreliable

Recovery and Sump

For operations requiring reclaim, install:

• A collection tank or sump (100–200 gal) in the bed or underneath
• A submersible pump (12V) to move dirty water from sump to dump station
• Plumbing from the work area back to the sump (tricky on truck-mounts; trailers handle this more easily)

Most mobile truck-mounts don’t reclaim; they rely on finding drain access (storm drains, gravel lots). Reclaim adds complexity and cost.

12V and 110V Power

12V System:

• Dual or triple battery bank (500+ amp-hours)
• 200 amp alternator to keep batteries charged while truck runs
• Lights, hose reel motor, pump controls

110V Power (if carrying a generator):

• 3–5 kW portable generator ($500–$1,500)
• Powers auxiliary tools, battery trickle charger, heated cab in winter
• Takes up bed space; not always practical on mobile rigs

Most truck-mounts run on 12V only, relying on truck ignition for charging.

Fuel Efficiency and Running Costs

A truck-mounted rig has three fuel consumers:

• Truck engine (0.06 gal per mile at highway speeds)
• Pump/pressure washer (1.5–2 gal/hour operation)
• Hot water heater (optional; 1–1.5 gal/hour)

Hourly Operating Cost:

• Truck idling while working: ~$2–$3 in fuel (idle consumption is high)
• Pump running: $2–$3/hour
• Hot water burner: $1–$2/hour
• Total: $5–$8 per working hour in fuel alone

To offset, charge accordingly. A truck-mount paying for itself requires consistent work at profitable rates.

Fleet Considerations

Multi-Truck Operations:

For a 5-truck cleaning fleet with rotating crews:

• Standardize equipment (same pressure washers, nozzles, hoses) across all trucks
• Maintain a spare truck to cover downtime while one is serviced
• Rotate crews through different trucks to distribute wear evenly
• Establish a weekly maintenance check (pressure test, filter cleaning, bolt torque)
• Cross-train crews on each truck to maintain flexibility

Dispatch Efficiency:

• Use route software (Workiz, ServiceTitan) to optimize job sequences and minimize drive time between appointments
• Each truck should average 4–6 jobs per day at $1,000–$2,000 per job for profitability

Maintenance Schedule:

• Pump: Oil/filter every 50 hours, full service every 500 hours
• Truck: Per manufacturer spec (usually 5,000–10,000 mile intervals)
• Hot water burner: Descale annually, full inspection every 2 years

Advantages Summary: When Truck-Mount Wins

Aspect	Truck-Mount	Trailer
Multi-location routes	Better	Requires multiple tow vehicles
Single-operator crew	Better	Acceptable
Brand visibility	Cleaner, more professional	Obvious workhorse, less polished
Hot water integration	Easier	Possible but complex
Storage/parking	Minimal lot needed	Requires dedicated space
Cost to start	$20k–$40k	$10k–$18k
Operational simplicity	High (one vehicle)	Requires hitch/unhitch skill
Payload capacity	Limited to truck bed	More flexible