Since 1981, has been a powerful industry supplier, providing high quality pressure washers, parts, pumps & accessories for the Cleaning, construction & plumbing Industries.
We strive to provide you with relevant customer service, quantity discounts, factory assembled, equipment professionally tested and packed. 

AAA Professional Triplex Pump Kit 90034

By : AAA Pumps

SKU : 90034
  • Quick Specs
  • PSI: 4200
  • GPM: 4
Regular Price: $379.99
In Stock

Engineered to surpass expectations, the 90034 AAA® Professional Triplex Pump is highly efficient and minimizes engine load while delivering top performance. This easy-to-install pump replacement kit is for gas pressure washers* with a horizontal engine and a 1" diameter shaft, such as the Honda GX390. This pump can produce up to 4400 PSI at 4.0 GPM. The 90034 is designed with dual oversized ball bearings to reduce friction and allow for long lasting performance in the toughest cleaning environments. The 90034 features a stainless steel integrated unloader featuring our easy-start system. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility)


Whether you’re looking for a replacement part or an accessory to enhance your cleaning experience, SIMPSON has the right one for you! Our accessories provide more cleaning options for the homeowner and professional to get the job done efficiently. Many of our accessories are designed to fit most gas and electric pressure washers.


  • Extend the Life of Your Pressure Washer: Save money by replacing your pump instead of buying a whole new power washer. This easy-to-install kit is great for power washers that can support 4400 PSI at 4.0 GPM to wash walls, fences, sidewalks, vehicles, and more.
  • Easy Installation: This replacement pump features a garden hose inlet and QC quick connect high pressure hose outlet. The SAE standard bolt pattern that fits most* gas-powered pressure washers. Each kit includes a siphon tube with filter, mounting bolts, shaft key, and instruction booklet to get your machine back in action as quickly as possible. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility)
  • Adjustable Power: This pump includes PowerBoost® Technology that delivers higher pressure at the nozzle for a more efficient cleaning experience. There is also a hand turn knob that lets you reduce power at your convenience for tasks that require lower pressure.
  • Know When to Change Your Oil: The sight glass and advanced oil seal technology eliminates the need for a dipstick. With visibility to the oil level and the oil itself, you can easily see when oil levels are low or if water has clouded the oil.
  • Get the Right Pump for Your Machine: This pump is designed for gas powered pressure washers with horizontal engines. Its SAE bolt pattern, hardware, and standard connections make it a great fit for many brands and models of power washers.


UPC (Online/In-Store): 8 79399 00233 5
PSI: 4400
GPM: 4.0
Orientation: Horizontal
Shaft Size: 1"
Hardware/Fittings: Quick Connect
Gas or Electric: Gas
Pump Body Material: Black Aluminum
Pump Head Material: Brass
Warranty: 5 Year Limited Warranty
Unit Weight: 16 lbs
Unit Length: 11.5"
Unit Width: 11.5"
Unit Height: 11"
Shipping Carton Weight: 18 lbs
Shipping Carton Length: 13.5"
Shipping Carton Width: 13.5"
Shipping Carton Height: 12"
Discontinued by Manufacturer: No


Manufacturer: AAA Pumps
SKU: 90034
PSI: 4200
GPM: 4
Brand: AAA
Shaft size: 1 INCH
Variant MPN: 90034

Related Products
Customers Also Bought
Recently Viewed
Water Cannon ships via UPS with delivery to the lower 48 states of the United States. When you purchase any items from Water Cannon, we will email you a receipt with tracking information so you can track your shipment.

We are currently offering FREE SHIPPING and handling on PREPAID orders over $99.00.* This free shipping rate applies to prepaid orders only, paid via credit card, fax checks, etc. For orders placed by phone or online that are under $99.00, a shipping charge of $15.30 will be applied.

Click here for information on international shipping and our shipping policies.