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  • 4 GPM, 4200 PSI; garden hose inlet / QC outlet threading
  • Fits most cold water gas pressure washers with horizontal engines; 1" shaft size
  • Dual oversized ball bearings for long-lasting performance
  • Comes standard fully plumbed with integrated easy-start
  • PowerBoost technology, oil sight glass, and brass manifold
UPC Code: 879399002335
Shipping: Usually Ships in 3-5 Business Days

Other Products from this Line

Flow Rate 4 GPM
Manifold Brass
PSI 4,200 PSI
Shaft Size 1 Inches
Style Cold Water
Threading Garden Hose Inlet / M22 Outlet
Type Pumps
Unloader Integrated & Adjustable with Easy Start


Designed for superior performance, this Simpson 90034 AAA C42 Triplex horizontal pump is designed to fit most makes and models of gas pressure washers with horizontal engines and a 1" shaft size. This Triplex horizontal pump is efficient while minimizing the strain on the engine of your pressure washer. It contains dual oversized ball bearings for friction resistance and PowerBoost technology that produces higher pressure at the nozzle.

This pump also features an adjustable unloader, an easy-start system, and thermal relief protection to prevent pump overheating. Plus, with an integrated sight glass and oil seal technology, there's no need for a dipstick to check oil levels. It comes fully plumbed with a brass manifold. It is rated at 4200 PSI and 4 GPM.

Due to manufacturer production variations, check the Compatibility resource to ensure this part is suitable for your application.

Because this item is not stocked in our warehouse, processing, transit times and stock availability will vary. If you need your items by a certain date, please contact us prior to placing your order. Expedited shipping availability may vary. We cannot guarantee that this item can be cancelled off of the order or returned once it is placed.

Resources and Downloads

Simpson 90034 Manual Manual Simpson Pumps Sell Sheet Compatibility

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