--- product_id: 17071690 title: "AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4\" Shaft, Horizontal Engine Fit, PowerBoost (90037)" brand: "aaa" price: "2131.68 DT" currency: TND in_stock: true category: "Aaa" url: https://www.desertcart.tn/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer store_origin: TN region: Tunisia --- # PowerBoost tech for max pressure 2.5 GPM flow rate SAE bolt pattern for easy install AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) **Brand:** aaa **Price:** 2131.68 DT **Availability:** βœ… In Stock ## Summary > 🚿 Upgrade your clean game with power & precision! ## Quick Answers - **What is this?** AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) by aaa - **How much does it cost?** 2131.68 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer) ## Best For - aaa enthusiasts ## Why This Product - Trusted aaa brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to Last:** Brass manifold & dual oversized ball bearings for durability & smooth operation - β€’ **Smart Maintenance:** Sight glass & oil seals eliminate dipstick hassle, plus thermal relief prevents overheating - β€’ **PowerBoost Technology:** Adjust nozzle pressure on-demand for every surface - β€’ **Effortless Installation:** SAE standard bolt pattern fits most horizontal engines seamlessly - β€’ **Unleash 3700 PSI Cleaning Power:** Industrial-grade pressure to blast away grime fast ## Overview The AAA 3700 PSI 2.5 GPM Triplex Pressure Washer Pump Kit (model 90037) is a robust replacement pump designed for SIMPSON gas power washers with horizontal engines and 3/4" shafts. Featuring PowerBoost technology for adjustable pressure, durable brass components, and easy installation with SAE bolt pattern compatibility, it delivers professional-grade cleaning performance with minimal maintenance. Ideal for homeowners and pros seeking to restore or enhance their pressure washer’s power and reliability. ## Description Engineered to surpass expectations, the AAA Triplex Pump Kit (90037) refreshes tired machines and helps you avoid replacing an entire unit. Delivering up to 3700 PSI at 2.5 GPM, this industrial-grade replacement is a smart fit for many gas powered pressure washers that use a horizontal engine and a 3/4" diameter shaft, including popular engines like the Honda GX200 (Check your pressure washer’s inlet and outlet orientation to ensure compatibility). PowerBoost Technology sends higher pressure to the nozzle for a faster clean, while the integrated stainless steel unloader on the pressure washer water pump supports fast starts and dual oversized ball bearings minimize friction and engine load for long-lasting performance. Installation is straightforward thanks to the SAE bolt pattern, garden-hose inlet, and M22 high-pressure outlet, and the kit includes a siphon tube with filter, mounting bolts, shaft key, and instructions. The sight glass and advanced oil seals let you see oil level and quality at a glance (no dipstick needed). You can easily see when oil levels are low or if water has clouded the oil. Thermal relief protection keeps the pump from overheating. Built with robust metal components, the 90037 is a dependable power washer pump replacement for homeowners and pros using SIMPSON pressure washer parts and other common pressure washer pumps. It is great for walls, fences, sidewalks, vehicles, and more. Rely on AAA for a powerful replacement for your Simpson pressure washer pump. Simpson power washers and Simpson power washer parts are built for DIYers and professionals alike to tackle any cleaning job. ## Features - AAA TRIPLEX REPLACEMENT POWER WASHER PUMP: Replace your SIMPSON pressure washer pump with the AAA Triplex Power Washer Pump to restore cleaning power; It offers up to 3700 PSI at 2.5 GPM and fits horizontal engines with 3/4" shaft such as the Honda GX200 - EASY INSTALLATION: SAE standard bolt pattern fits many gas pressure washers with horizontal engines; To ensure compatibility, be sure to match engine orientation, PSI, GPM, engine shaft diameter, and current pump inlet and outlet connection - ADJUSTABLE PERFORMANCE: Rely on PowerBoost Technology to increase pressure at the nozzle; Turn the hand knob to match power to tasks from siding and sidewalks to fleet vehicles; Stainless steel integrated unloader supports an easy-start system - DURABILITY AND EASY MAINTENANCE: Dual oversized ball bearings reduce friction; Thermal relief valve prevents the pump overheating; The sight glass and advanced oil seal technology eliminates the need for a dipstick; Brass manifold adds durability - POWER WASHER PUMP REPLACEMENT NOTES: This gas powered pressure washer replacement pump features a garden hose inlet and threaded M22 connection for use with pressure washer attachments; Includes siphon tube, hardware, shaft key, and instructions ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TQLMNMC | | Best Sellers Rank | #40,926 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #19 in Pressure Washer Pumps | | Brand Name | AAA | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (525) | | Flow Rate | 2.5 Gallons Per Minute | | Global Trade Identification Number | 00879399002076, 08793990020760 | | Included Components | Pump Kit | | Item Dimensions L x W x H | 12"L x 9"W x 4"H | | Item Type Name | 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) | | Item Weight | 9 Pounds | | Manufacturer | AAA Pumps | | Manufacturer Part Number | 90037 | | Manufacturer Warranty Description | 5-year warranty | | Material Type | Brass | | Model Number | 90037 | | Power Source | Gas Powered | | Product Style | 3700 PSI at 2.5 GPM | | UPC | 879399002076 | | Unit Count | 1.0 Count | | Voltage | 120.0 | ## Product Details - **Brand:** AAA - **Color:** Black - **Global Trade Identification Number:** 00879399002076, 08793990020760 - **Item Weight:** 9 Pounds - **Material:** Brass - **Maximum Flow Rate:** 2.5 Gallons Per Minute - **Power Source:** Gas Powered - **Product Dimensions:** 12"L x 9"W x 4"H - **Style:** 3700 PSI at 2.5 GPM - **Voltage:** 120.0 ## Images ![AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) - Image 1](https://m.media-amazon.com/images/I/71Dz7TCDcgL.jpg) ## Frequently Bought Together - AAA 90037 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3700 PSI, 2.5 GPM, 3/4" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Valley Industries Pressure Washer Premium Pump Oil - 1 Liter, Black, (PK-85490000) - STA-BIL Pump Protector - Protects Pressure Washer Pumps and Other Internal Components During Storage, Next Gen Anti-Freeze and Lubricant Formula, 4oz (22007) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer](https://www.desertcart.tn/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-03*