AAA Triplex Replacement Pump Kit 3700 PSI 2.5 GPM for SIMPSON Gas Power Washers | PowerBoost

The AAA Triplex Pump Kit 90037 is designed to refresh older SIMPSON pressure washers, delivering robust cleaning power without replacing the whole unit. This replacement pump is engineered to reach up to 3700 PSI at 2.5 GPM and is compatible with many gas-powered washers that use a horizontal engine and a 3/4 inch shaft, including popular options like the Honda GX200. Before you install, take a moment to verify your engine orientation, PSI, GPM, and inlet/outlet connections to ensure compatibility.

Powerful, adaptable performance

PowerBoost Technology sends higher pressure to the nozzle when you need it, helping you tackle siding, sidewalks, and other surfaces efficiently. A stainless steel integrated unloader supports an easy-start system, while dual oversized ball bearings reduce friction and engine load for smoother operation over time.

• Up to 3700 PSI at 2.5 GPM for strong cleaning power
• PowerBoost technology to tailor pressure at the nozzle
• Stainless steel unloader and easy-start design
• Dual oversized bearings to minimize wear
• Thermal relief to prevent overheating

Maintenance and monitoring are straightforward thanks to an integrated sight glass and advanced oil seals that let you check oil level and quality at a glance—no dipstick required. The brass manifold adds rugged durability, helping the pump endure demanding cleaning sessions.

Durable construction and easy installation

Built with robust metal components, the 90037 is a dependable option for homeowners and professionals using SIMPSON parts or other common pressure washer pumps. A garden-hose inlet and M22 high-pressure outlet support standard attachments, and the kit includes a siphon tube with filter, mounting bolts, shaft key, and simple instructions.

• SAE bolt pattern aligns with many gas units for straightforward mounting
• Garden-hose inlet and M22 outlet accommodate common hoses and accessories
• Includes siphon tube with filter, hardware, shaft key, and instructions

The AAA 90037 offers a practical path to restoring cleaning power for walls, fences, sidewalks, vehicles, and more. It is designed to complement both DIY and professional workflows, giving you a dependable replacement option for SIMPSON pressure washer pumps. Always verify orientation and compatibility before installation to ensure the best fit for your machine.

Why choose AAA for your pump replacement

AAA focuses on durable construction and thoughtful design to help you get back to work quickly. The combination of a sight glass, oil seals, and a brass manifold is intended to support long service life and easy maintenance. The included hardware and clear instructions reduce setup time, so you can reach your cleaning targets with confidence.

Real-world use often involves tackling outdoor surfaces like brick, concrete, wood, and painted siding. The 90037’s specifications offer a balance of power and reliability that may suit both homeowners and pros cleaning driveways, fences, or fleet vehicles. If you are upgrading an older SIMPSON setup, this pump could be a practical option to refresh your unit and maintain solid performance over time.