Replacement AAA Triplex Pressure Washer Pump, 4400Psi, 4.0GPM

Replacement AAA Triplex Pressure Washer Pump, 4400Psi, 4.0GPM

The AAA 90034 Triplex Pressure Washer Pump is a high-performance replacement pump designed to restore or upgrade your pressure washer with serious cleaning power. Built to deliver up to 4400 PSI at 4.0 GPM, this pump combines efficiency, durability, and easy installation for demanding cleaning jobs. Featuring a brass head, dual oversized ball bearings, and an integrated unloader with easy-start technology, it reduces engine strain while maximizing output—because your pressure washer should be doing the hard work, not your engine.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 90034
• Brand: AAA
• Product Type: Triplex pressure washer pump (replacement)
• Max Pressure: 4400 PSI
• Flow Rate: 4.0 GPM
• Pump Type: Triplex plunger pump
• Drive Type: Direct drive
• Power Source: Gasoline engine driven
• Shaft Size: 1 inch horizontal shaft
• Compatibility: Designed for engines like Honda GX390
• Head Material: Brass for durability and corrosion resistance
• Pump Housing: Black anodized aluminum
• Bearings: Dual oversized ball bearings for reduced friction and longer life
• Unloader: Stainless steel integrated unloader with easy-start system
• PowerBoost Technology: Yes
• Oil System:
  • Sight glass for easy monitoring
  • Advanced oil seal design eliminates dipstick need
• Inlet/Outlet: 1" hose compatibility (verify orientation before installation)
• Performance: Designed for high efficiency and reduced engine load

Ideal For

• Replacing worn or underperforming pumps on gas pressure washers
• Heavy-duty cleaning jobs requiring high PSI and strong water flow
• Contractors and homeowners needing reliable, long-lasting pump performance
• Equipment using 1" horizontal shaft engines like Honda GX390
• Anyone ready to bring their pressure washer back to life—and then some