It may not need a separate pump to run properly. The NorthStar Pressure Washer requires a constant 5 GPM minimum coming into the pump. If your tank can gravity feed 5 GPM or more, you don't need a pump. It you are less than 5 GPM you would need to use a pump.
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NorthStar Gas Hot Water Commercial Pressure Washer Skid, 4,000 PSI, 4.0 GPM, Honda Engine

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Shipping:
Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
Store Pickup:
Out of stock at Fredericksburg VA
- Horizontal shaft engines last five times as long as vertical shaft engines
- 1/2in. Schedule 80 heating coil with stainless steel wrap
- Uses 1/2in. Schedule 80 extra-heavy pipe
- Forged brass manifold gives improved strength over cheaper aluminum
- Easy Start stops pressure build-up during start-up
Prop 65 Warning: See Details
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Description
Key Specs
Reviews
Q & A
Accessories
Warranty
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Product Summary
What's Included
- (1) Hot water pressure washer (1) Quick connect industrial rear entry gun (1) 48in. lance with nozzle quick connector (1) 50ft. gray non-marking quick connect hose (1) 0° nozzle (1) 15° nozzle (1) 25° nozzle (1) 40° nozzle (1) Downstream chemical injector
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BUILT TO LAST
Constructed with a HEAVY-DUTY HEATING COIL wrapped in stainless steel and a forged brass manifold, this pressure washer is designed for durability and long-term use
EXCEPTIONAL CLEANING POWER
Harness the robust 18 HP HONDA GX630 ENGINE and CAT direct drive pump combo, delivering 4,000 PSI of hot water to tackle the toughest cleaning jobs efficiently
ADVANCED HEATING TECHNOLOGY
Its custom-molded ceramic fiber refractory combustion chamber maximizes HEAT RETENTION and efficiency, enabling CONSISTENT HIGH-TEMPERATURE water output
CONVENIENCE AND CONTROL
Features such as an ADJUSTABLE PRESSURE CONTROL, easy-start function, and a rear hose-entry spray gun make operation seamless, enhancing the user experience
RELIABLE OPERATION
Equipped with a PARKER HANNIFIN RACOR FUEL FILTER and water separator, this machine ensures smooth operation by eliminating common burner ignition issues
Features + Benefits

- Horizontal shaft engines last five times as long as vertical shaft engines
- 1/2in. Schedule 80 heating coil with stainless steel wrap
- Uses 1/2in. Schedule 80 extra-heavy pipe
- Forged brass manifold gives improved strength over cheaper aluminum
- Easy Start stops pressure build-up during start-up
- Adjustable pressure for job versatility
- Sight glass lets you quickly check pump oil
- Control center with adjustable water temperature, diagnostic lights, hot or cold mode
- Extras: safety relief, cast iron cylinder sleeve
- Battery required (not included)
Key Specs
| Attribute | Specification |
|---|---|
item# | 157594 |
Brand | NorthStar |
Manufacturer's Warranty | 24 months parts/24months labor |
Ship Weight | 550.0 LB |
Pressure | 4,000 PSI |
Flow | 4 GPM |
Engine Model | GX630 V-twin |
Engine Displacement | 630 cc |
Fuel Type | Gasoline |
Pump | CAT 66dx |
Drive Style | Direct |
Adjustable Pressure | Yes |
Gross Torque | 29.2 ft-lbs. |
Engine Oil Included | No |
Engine Oil Type | SAE 30 Motor Oil |
| Attribute | Specification |
|---|---|
Fuel Capacity | 4 Gal |
Max. Inlet Water Temp | 140 °F |
Max. Outlet Water Temp | 210 °F |
Orifice Size | 4 |
Chemical Injector | Yes |
Hose Length | 50 ft |
Coupler Size | 3/8 in |
Nozzle Type | 0°, 15°, 25°, 40° and Soap |
Quick Connect Nozzle | Yes |
Pump Oil Included | Yes |
Pump Oil Type | SAE 30 Nondetergent |
Low Oil Shutdown | Yes |
Thermal Protector | Yes |
Product Weight | 500.0000 lb |
Dimensions L x W x H (in.) | 47.0 x 37.5 x 42.0 in |
Reviews
Questions & Answers
Questions
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· 16 years ago
Does this pressure washer skid, needs a separate water pump by conecting it to a water tank?
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NorthStarExperts· 14 years ago
Helpful?
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NorthStarExperts· 16 years ago
It does not. Please refer to page 5 in the manual online that explains how to hook it to a water tank.
Helpful?
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Br9758· 16 years ago
If you have at least 3/4 inch supply line you'll be ok.
I feed my water into my tank, so the machine never starves for water.Helpful?
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· 8 years ago
Does this have a lift point on it where something like a hoist can be used to lift into a pickup bed?
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Mork1728· 8 years ago
Yes it has a center lifting point I used a truss lifter for a skid steer to load in my enclosed trailer
Helpful?
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NorthstarExpert13· 8 years ago
This pressure washer has a lifting eye that can be used with a hoist to elevate or lower the pressure washer.
Helpful?
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· 13 years ago
Is the low pressure chemical injection downstream from the pump?
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productexpert6· 13 years ago
The pressure washer does include a downstream low pressure chemical injector.
Helpful?
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GSizemore· 13 years ago
Just bought the machine, and yes it is downstream from the pump and heater. This machine is a beast!!!!
Helpful?
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· 5 months ago
how do i order a new coil assembly for this pessure washer ? m157594AN.3
1 answer-
NorthstarExpert12· 5 months ago
The coil assembly, part #790017, can be purchased through our sister company, Jacks Small Engines. Please visit www.JacksSmallEngines.com for pricing and availability.
Helpful?
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· 8 months ago
what are the shipping dimensions and weight of the pressure washer?
1 answer-
NorthstarExpert12· 8 months ago
The shipping dimensions of this pressure washer are 48" long x 42" wide x 42" high. The shipping weight is 550 lbs.
Helpful?
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· a year ago
Will this run a 20 inch surface cleaner
1 answer-
NorthstarExpert12· a year ago
This pressure washer is capable of working with a 20" surface cleaner; however, different surface cleaners do have different minimum and maximum PSI and GPM requirements, so it is best to check the specifications of the surface cleaner to determine if this machine will work.
Helpful?
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· 2 years ago
Where is the fuel shut off located on the unit
1 answer-
NorthstarExpert12· 2 years ago
This pressure washer is equipped with a fuel pump, so it does not require a shut off valve.
Helpful?
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· 4 years ago
What size is the in line fuel filter
1 answer-
NorthstarExpert11· 4 years ago
The fuel filter has a 1/4" FNPT inlet and outlet port.
Helpful?
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· 4 years ago
Does this Unit charge the battery on its own or do I need to hook it up to the Aux on the trailer?
1 answer-
NorthstarExpert12· 4 years ago
The engine on this unit has a high amp charging system to keep the battery charged and run the 12V burner.
Helpful?
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· 5 years ago
Could someone give me a ballpark figure on fuel run times on this? Washer and burner, please. TYIA
1 answer-
NorthstarExpert12· 5 years ago
The burner and the engine have a consumption rate of 2 gallons per hour. The tanks are 4 gallons, so it would run for approximately 2 continuous hours.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
24 months parts/24months labor
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Item # 157594
$5799.99Shipping:
Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
Store Pickup:
Out of stock at Fredericksburg VA
Item # 157116
$5299.99Shipping:
Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
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Item # 157598
$7999.99Reg $8999.99Save $1000.00Order today to get this price.
Shipping:
Free shipping (lower 48 states) - Available nowHeavy/large item. Lift gate service available.
Store Pickup:
Out of stock at Fredericksburg VA
Item # 157310
$4999.99Shipping:
Free shipping (lower 48 states) - Available now
$19.99 Same DayHeavy/large item. Lift gate service available.
Store Pickup:
4 in stock at Fredericksburg VA - Pickup in under 1 hr
Specifications
4,000 PSI
3,000 PSI
4,000 PSI
3,000 PSI
4 GPM
4 GPM
7 GPM
4 GPM
GX630 V-twin
GX390
Command Pro V-twin
GX390
630 cc
389 cc
725 cc
389 cc
Gasoline
Gasoline
Gasoline
Gasoline
CAT 66dx
CAT 66dx
Northstar
CAT 66dx
Direct
Direct
Belt
Direct
Yes
Yes
Yes
Yes
29.2 ft-lbs.
18.5 ft-lbs.
38.4 ft-lbs.
18.5 ft-lbs.
No
No
No
No
SAE 30 Motor Oil
SAE 30 Motor Oil
SAE 30 Motor Oil
SAE 30 Motor Oil
4 Gal
1.61 Gal
15 Gal
8.75 Gal
140 °F
140 °F
140 °F
140 °F
210 °F
250 °F
200 °F
250 °F
4
4.5
3.5
4.5
Yes
Yes
Yes
Yes
50 ft
50 ft
50 ft
50 ft
3/8 in
3/8 in
3/8 in
3/8 in
0°, 15°, 25°, 40° and Soap
15° Wet Steam, 15°, 25°, 40°, and Chemical
0°, 15°, 25°, 40° and Soap
0°, 15°, 25°, 40°, Steam and Soap
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SAE 30 Nondetergent
SAE 30 Nondetergent
Universal Tractor Transmission
SAE 30 Nondetergent
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
500.0000 lb
610.0000 lb
800.0000 lb
600.0000 lb
47.0 x 37.5 x 42.0 in
47.5 x 61.5 x 47.875 in
45.5 x 54.25 x 46.25 in
64.0 x 33.0 x 42.5 in
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Honda
-
-
-
4
-
6
-
Recoil
-
Electric
-
-
-
14 in
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