AR Blue Clean


Pressure Washer 4000 PSI 4 GPM Triplex Plunger Pump

Reg. $359.99 Save $124.10
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Anchor to Specifications and Description


The pump is one of the most critical parts of any pressure washer because it’s responsible for producing the high water pressure that delivers that satisfying blast of water for your cleaning chores. If your pump quits working, replacing it with the AR Blue Clean Vertical Pump Replacement is much less expensive than buying a whole new pressure washer. You can tell it may be time for a new pump if you turn on your pressure washer and it powers up just fine but doesn’t pressurize the water. Pressure-washer pumps can quit working for several reasons. Sometimes they were accidentally left running with no pressure relief. Maybe water left in the pump caused mineral build-up or corrosion, which can wear out the pump seals and piston. Other times they crack, or just suffer from natural wear and tear. Whatever the reason, it’s not unusual that a pump would give out while the washer still has plenty of life in it. This replacement pump is a triplex plunger pump designed for gas-engine driven units. It has a maximum PSI of 4,000 and is rated for 4 GPM and models with 11-13 HP. Triplex pumps, which generally are found on professional-level washers, are the easiest to replace when they go kaput. Triplex pumps use 3 pistons and plungers to create a higher PSI than the axial cam pumps found on many pressure washers. The pump comes with a built-in pressure-control valve that lets you customize the pressure of the water depending on the specific cleaning task. It also has a downstream chemical injection system, EZ start valve and thermal-relief valve. When your pump quits pumping, let this AR Blue Clean triplex-plunger pump get you back under pressure rather than buying a whole new pressure washer.


  • Triplex-plunger pump replaces similar pumps in gas-powered pressure washers, extending washer life after old pump gives out
  • Includes pump, 3/8-inch male nipple adaptor, ¾-inch female nut, inlet filter, detergent hose with filter, and quick-connect coupler
  • Designed for 4000 PSI, 4 GPM engines
  • Can be directly coupled to motors with standard gas flange
  • Pump body in die-cast aluminum alloy
  • Thermal relief valve
  • Specifications:
  • Shaft size: 1 inch
  • Discharge thread: 3/8 inch F
  • Inlet thread: 3/8 inch F
  • Oil capacity: 16 ounce, prefilled with synthetic oil
  • Start style: EZ Start
  • Maximum pounds per square inch (PSI): 4000
  • Rotations per minute (RPM): 3400
  • Horsepower: 11-13 HP
  • Maximum gallons per minute (GPM): 4

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