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90038 AAA Triplex Pressure Washer Pump 3800 PSI with PowerBoost Horizontal Mounting

In stock
Part Number
90038
$329.90

The 90038 pump is a Triplex plunger pressure washer pump from AAA that's rated for 3800 PSI at a flow rate of 3.5 GPM.

This highly efficient pump reduces the engine load while providing top performance.
The 90038 pump kits utilizes PowerBoost technology to generate higher pressure at the spray nozzle, ensuring that pressure isn't lost as water travels through the power washer system.

Features of the 90038 Triplex Pump:

  • High-pressure pump rated for 3800 PSI @ 3.5 GPM
  • Durable and fully adjustable unloader with ergonomic control built directly into the pump
  • AAA PowerBoost technology keeps the water pressure strong
  • Included thermal relief valve protects against overheating
  • Corrosion-protected aluminum crankcase reduces wear and tear from regular use
  • No dipstick is required thanks to sight glass and advanced oil seals
  • Gas engine flange and hollow shaft that fits most horizontal shaft engines
  • Includes siphon tube with filter, mounting bolts, and a shaft key

The 90038 pressure washer pump is rated for a maximum pressure of 3800 PSI at a flow rate of 3.5 gallons-per-minute (GPM.) This AAA C Series pump utilizes dual oversized ball bearings for better wear, friction resistance, and longer-lasting performance in tough cleaning environments.

An integrated and fully adjustable stainless steel unloader features an industry-leading easy-start system.

90038 AAA Pump Specifications:

Maximum Pressure Rating: 3800 PSI
Flow Rate: 3.5 GPM
Inlet Port: 3/4" GH
Discharge Port: 3/8" Quick-Connect female
Inlet Pressure Range: 10-60 PSI
Thermal Relief Port: 1/2" NPT
Shaft Diameter: 1"
Key Way: M8
Pump Oil Capacity: 11 fl. oz.
Head: Brass

Additional Notes & Service Information

The pump in the AAA 90038 Pressure Washer pump kit is not designed for gravity-fed systems, and an on-demand water pump is always recommended to consistently supply water to the pump at 20-60 PSI of inlet pressure.

Service Note:

The "Burst Pressure" of a pressure washer pump is the highest pressure the pump produces when in a static position and when the trigger is first squeezed, giving the initial burst of pressure and does not reflect the actual operating pressure.

The accurate operating PSI of any pump would be determined by the engine’s horsepower and the size of the nozzle being used at the end of the wand, restricting water flow and causing back pressure.

It is possible for a single pump to be rated at various GPM and maximum PSI levels by adjusting factors such as engine RPMs, nozzle size, or engine horsepower.

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The "Burst Pressure" of a pressure washer pump is the highest pressure the pump produces when in a static position and when the trigger is first squeezed, giving the initial burst of pressure and does not reflect the actual operating pressure. The accurate operating PSI of any pump would be determined by the engine’s horsepower and the size of the nozzle being used at the end of the wand, restricting water flow and causing back pressure. It is possible for a single pump to be rated at various GPM and maximum PSI levels by adjusting factors such as engine RPMs, nozzle size, or engine horsepower.
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