NorthStar® Hot Water Commercial Pressure Washer Trailer with 2 Wands 4000 PSI 7 GPM 525-Gal (1575973)
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NorthStar 1575973 Hot Water Commercial Pressure Washer Trailer – 4000 PSI, 7 GPM, 525-Gal. Tank
The NorthStar 1575973 Hot Water Commercial Pressure Washer Trailer is a heavy-duty mobile cleaning system built for demanding commercial, agricultural, industrial, and property maintenance applications. With 4000 PSI, up to 7 GPM, hot water cleaning capability, dual-wand operation, and a large 525-gallon water tank, this trailer-mounted pressure washer is designed to deliver powerful cleaning performance wherever the job takes you.
Powered by a commercial-grade NorthStar e740 739cc EFI engine, this hot water pressure washer trailer provides dependable starting, strong output, and fuel-efficient operation. The Electronic Fuel Injection system helps reduce inconsistent starts, uses less fuel, and provides strong performance compared to comparable carbureted engines.
This system is designed to run 7 GPM at 4000 PSI from one gun or 3.5 GPM at 4000 PSI from both guns, allowing two operators to clean at the same time without a drop in pressure.
Important Delivery and Sale Notes
This item is not for sale in Alaska or California. Customers are responsible for checking local codes and regulations before purchase.
This item is too large for liftgate delivery. Customer must provide a loading dock, forklift, or other suitable unloading equipment at delivery.
A 12V DC automotive or marine battery is required and not included.
Key Features & Benefits
✔ Trailer-Mounted Hot Water Pressure Washer
Designed for mobile commercial cleaning where hot water, high pressure, and large water capacity are needed.
✔ 4000 PSI Cleaning Power
Provides strong pressure for tough cleaning jobs, equipment washing, surface cleaning, and commercial applications.
✔ Up to 7 GPM Flow Rate
Delivers high-volume cleaning performance for faster washing and rinsing.
✔ Dual-Wand Operation
Run 7 GPM at 4000 PSI from one gun or 3.5 GPM at 4000 PSI from both guns, allowing two users to work at the same time.
✔ 525-Gallon Water Tank
Large onboard water tank allows you to clean in remote locations where water access is limited.
✔ NorthStar e740 EFI Engine
739cc commercial-grade EFI engine provides reliable power, efficient fuel use, and improved starting performance.
✔ Industrial Belt Drive Pump
Belt drive pump with brass manifold, ceramic plungers, and safety relief is built for long life in demanding conditions.
✔ Hot Water Cleaning Capability
Adjustable temperature allows hot water cleaning up to 200°F for grease, grime, oil, and heavy buildup.
✔ Parker Hannifin Racor Fuel Filter / Water Separator
Helps prevent burner ignition problems by separating water from fuel.
✔ Adjustable Pressure
Allows you to match pressure output to the cleaning task.
✔ Easy Start System
Helps reduce pressure buildup during startup for easier operation.
✔ Diagnostic Lights
Signal the operation of key components for easier monitoring.
✔ Two High-Pressure Hose Reels
Built-in hose reels help keep hoses organized and ready for use.
✔ Rear Hose Entry Spray Gun
Rear hose entry spray gun with split lance helps keep the hose out of the operator’s way for easier handling.
✔ Trailer with Lights and Brakes
Trailer includes lights and brakes on both axles for safe transport.
✔ Jack and Aluminum Storage Box
Includes trailer jack and aluminum truck-style storage box for added convenience.
Best Applications
The NorthStar 1575973 Hot Water Commercial Pressure Washer Trailer is ideal for:
- Commercial pressure washing
- Equipment cleaning
- Fleet washing
- Farm and ranch cleanup
- Heavy machinery washing
- Construction site cleanup
- Industrial cleaning
- Graffiti removal
- Grease and oil removal
- Property maintenance
- Mobile pressure washing businesses
- Remote cleaning jobs without nearby water access
What’s Included
- NorthStar hot water pressure washer
- Trailer
- Two 4 ft. lances
- Quick-couple nozzles
- Two high-pressure hose reels
- 525-gallon water tank
Detailed Specifications
| Attribute | Specification |
|---|---|
| Brand | NorthStar |
| Item Number | 1575973 |
| Product Type | Hot Water Commercial Pressure Washer Trailer |
| Pressure | 4000 PSI |
| Flow Rate | 7 GPM |
| Dual-Gun Output | 3.5 GPM / 4000 PSI from Each Gun |
| Engine Brand | NorthStar |
| Engine Model | e740 |
| Engine Displacement | 739cc |
| Engine Type | EFI |
| Fuel Type | Gasoline |
| Fuel Capacity | 15 Gallons |
| Gross Torque | 38.4 ft.-lbs. |
| Start Type | Electric and Recoil |
| Low Oil Shutdown | Yes |
| Pump Brand | NorthStar |
| Pump Drive Style | Belt Drive |
| Pump Manifold | Brass |
| Pump Plungers | Ceramic |
| Adjustable Pressure | Yes |
| Chemical Injector | Yes |
| Thermal Protector | Yes |
| Max Inlet Water Temperature | 140°F |
| Max Outlet Water Temperature | 200°F |
| Water Tank Capacity | 525 Gallons |
| Hose Length | 150 ft. |
| Coupler Size | 3/8 in. |
| Coupler Type | 22mm Quick Connection |
| Nozzle Types | 0°, 15°, 25°, 40° and Soap |
| Quick-Connect Nozzles | Yes |
| Orifice Size | 7 |
| Wheel Diameter | 15 in. |
| Engine Oil Included | No |
| Engine Oil Type | SAE 30 Motor Oil |
| Pump Oil Included | Yes |
| Pump Oil Type | Universal Tractor Transmission |
| Ship Weight | 1950 lbs. |
| Dimensions | 198 in. L x 77.75 in. W x 71.5 in. H |
| Manufacturer Warranty | 2-Year Limited Warranty |
| Battery | 12V DC Automotive or Marine Battery Required, Not Included |
Recommended Use
The NorthStar 1575973 is a strong choice for contractors, commercial cleaning crews, farms, municipalities, industrial users, and mobile pressure washing businesses that need high-performance hot water cleaning in a trailer-mounted package. With 4000 PSI, 7 GPM, dual-wand capability, a 525-gallon water tank, EFI engine, and industrial belt drive pump, this pressure washer trailer is built for serious cleaning jobs.
Warranty
- 2-Year Limited Manufacturer Warranty
- 1575973 Owner's Manual
Some Frequently Asked Questions
| Question | Answer |
|---|---|
| Does this pressure washer have the capability of holding 3 different types of water: hot, bleach, and regular? If so, how does that work? | This pressure washer can withstand a maximum inlet water temperature of 140°F. Do not use bleach in this system, as it can damage the pump and other components. |
| I’ve had this machine 10 years and the tank finally wore out. Can I just get the water tank? | The water tank is part #796785 and can be purchased separately. |
| I need to replace insulation on the burner. Where do I order parts online? I need a parts manual for part numbers. | The burner insulation is not currently sold as a separate part. Other parts can be found on pages 52–56 of the product manual. |
| Is the trailer DOT approved? | Yes, this trailer is DOT approved. |
| How many feet of hose comes with the wand? | Each hose reel includes 100 ft. of hose. |
| When should I change the oil filter? | The oil filter assembly, part #805816, and oil should be changed within the first month or 20 hours of use. After that, the maintenance schedule is every 6 months or 200 hours of use. |
| What size oil filter is needed for this unit? | The oil filter assembly is part #805816. |
| What is the torque spec for the lug nuts? | This trailer has 1/2 in. lug nuts. The torque range is 75–85 ft.-lbs. |
| How many gallons of fuel does it hold? | The engine has a 15-gallon steel gas tank. The burner also holds 15 gallons of fuel for heating. |
| What size is the lid on the water tank? | The fill cap, part #SNY34700088, has a 9.75 in. overall diameter. |
| Does this include a battery? If not, what type of battery do I need? | A battery is not included. The engine will not run and the burner will not fire unless a battery is installed. Use a standard top-post 12VDC, 18Ah automotive battery, Group 75/86. The battery compartment measures 11-1/8 in. L x 7-3/4 in. W x 10-1/8 in. H. |
| What is the correct size unloader or part number? | The unloader valve is part #796502. The unloader block is part #777409. |
| What brand is the trailer, and where can replacement parts be purchased, such as the axle and fenders? | The trailer is manufactured by Northern Tool. The left fender is part #789569, the right fender is part #789570, and the axle is part #797436. |
| What size tires are on the two-gun trailer? | This trailer is equipped with ST205/75D15, 15 in. tubeless tires. |
| Is this shipped assembled as shown? | Some assembly is required. Please refer to the manual for assembly instructions. |
| Can this be adjusted to 2,500 or 3,000 PSI? | Yes, it is possible to adjust the pressure down to 2,500 PSI. |
| Does it have a water hose connection? | This pressure washer trailer does not have a water hose connection for filling or draining. The tank is filled through the cap on top of the tank. Draining is done through the included hoses. |
| Does it have a chemical dispenser for soap? | Yes. This pressure washer is equipped with a quick-connect chemical injector, which siphons cleaning chemicals into a low-pressure washer spray downstream of the pump. |
| What pound axles does the trailer have? Can you haul it with a full water tank? | The trailer has a 7,000 lb. capacity with tandem axles. The trailer weight with a full water tank is approximately 6,550 lbs. It can be towed with water to the maximum fill level. |
| Does it have a bypass pump? | The pump on this pressure washer has a bypass. |
NOTE: Most products require at least some assembly.
Shipping Disclaimer
Due to rising fuel costs and lack of space on shipping trucks the costs in certain areas have been affected. An "out of area" fee may be necessary. If additional funds are required to fulfill your order we will reach out to you after your order is placed and give you options including possible terminal pick up. (Read more about our shipping policy and how freight shipping works.)
CALIFORNIA PROPOSITION 65 WARNING
Some (not all) of the products we carry can potentially expose you to chemicals including Benzene and Carbon Monoxide, which are known to the State of California to cause cancer and birth defects or other reproductive harms. If you have any questions you can always contact us.
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