--- product_id: 23326016 title: "4000 PSI 3.5 GPM Horizontal Replacement Pressure Washer Pump Kit, 90039 | Industrial Grade Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 1\" Shaft, Includes Hardware & Siphon Tube" brand: "aaa" price: "2829.93 DT" currency: TND in_stock: true category: "Aaa" url: https://www.desertcart.tn/products/23326016-4000-psi-3-5-gpm-horizontal-replacement-pressure-washer-pump store_origin: TN region: Tunisia --- # 3.5 GPM flow rate 4000 PSI max pressure 1" shaft, SAE bolt pattern 4000 PSI 3.5 GPM Horizontal Replacement Pressure Washer Pump Kit, 90039 | Industrial Grade Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 1" Shaft, Includes Hardware & Siphon Tube **Brand:** aaa **Price:** 2829.93 DT **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your clean game with power and precision! ## Quick Answers - **What is this?** 4000 PSI 3.5 GPM Horizontal Replacement Pressure Washer Pump Kit, 90039 | Industrial Grade Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 1" Shaft, Includes Hardware & Siphon Tube by aaa - **How much does it cost?** 2829.93 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/23326016-4000-psi-3-5-gpm-horizontal-replacement-pressure-washer-pump) ## 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 - • **Adjustable Pressure Control:** Easily dial down power for delicate surfaces or ramp up for tough grime. - • **Universal SAE Compatibility:** Fits most horizontal gas pressure washers with a 1" shaft—upgrade without hassle. - • **Oil Sight Glass & Advanced Seal:** Monitor oil health instantly—no dipstick needed, ensuring longer pump life. - • **Quick Connect & Garden Hose Ready:** Seamlessly integrates with popular hoses for fast setup and uninterrupted cleaning. - • **PowerBoost Technology for Peak Cleaning:** Experience turbocharged pressure for spotless results every time. ## Overview The AAA 4000 PSI 3.5 GPM Horizontal Replacement Pressure Washer Pump Kit (model 90039) is a durable, industrial-grade pump designed for gas-powered pressure washers with horizontal engines and a 1" shaft. Featuring PowerBoost Technology, adjustable pressure control, and an innovative oil sight glass, it delivers efficient, high-pressure cleaning while extending your machine’s lifespan. Compatible with standard SAE bolt patterns and quick-connect hoses, this pump offers a professional-grade upgrade backed by a 5-year warranty. ## Description Engineered to surpass expectations, the 90039 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 GX270. This pump can produce up to 4000 PSI at 3.5 GPM. The 90039 is designed with dual oversized ball bearings to reduce friction and allow for long lasting performance in the toughest cleaning environments. The 90039 features a stainless steel integrated unloader featuring our easy-start system. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility) ## Features - 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 4000 PSI at 3.5 GPM to wash walls, sidewalks, vehicles, and more - Compatibility: 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 power: 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 - Standard Connections: This replacement pump features a garden hose inlet and quick connect high pressure hose outlet; Use it with many pressure washer hoses, including Simpson Armor 41114, 41096, 41115 or Simpson Monster 41113, 41028, 41030, 41032, 41034 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TQLMPM0 | | Best Sellers Rank | #93,616 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #46 in Pressure Washer Pumps | | Brand | AAA | | Brand Name | AAA | | Color | Metallic | | Customer Reviews | 4.2 out of 5 stars 253 Reviews | | Flow Rate | 3.5 gpm | | Global Trade Identification Number | 00879399002090 | | Included Components | Pump Kit | | Item Dimensions L x W x H | 11"L x 11"W x 7.5"H | | Item Highlight | Industrial Grade Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 1" Shaft, Includes Hardware & Siphon Tube | | Item Type Name | Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines | | Item Weight | 14 pounds | | Manufacturer | Simpson Cleaning | | Manufacturer Part Number | 90039 | | Manufacturer Warranty Description | 5 year warranty | | Material | Brass | | Material Type | Brass | | Model Number | 90039 | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Gas Powered | | Product Dimensions | 11"L x 11"W x 7.5"H | | Product Style | PowerBoost Technology | | Specific Uses For Product | Replacement Part, pressure washing | | Style | PowerBoost Technology | | UPC | 879399002090 | | Unit Count | 1 Count | ## Product Details - **Brand:** AAA - **Color:** Metallic - **Global Trade Identification Number:** 00879399002090 - **Item Weight:** 14 pounds - **Material:** Brass - **Maximum Flow Rate:** 3.5 gpm - **Number of Packs:** 1 - **Power Source:** Gas Powered - **Product Dimensions:** 11"L x 11"W x 7.5"H - **Style:** 4000 PSI at 3.5 GPM ## Images ![4000 PSI 3.5 GPM Horizontal Replacement Pressure Washer Pump Kit, 90039 | Industrial Grade Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 1" Shaft, Includes Hardware & Siphon Tube - Image 1](https://m.media-amazon.com/images/I/71UfvYTtB6L.jpg) ## Frequently Bought Together - AAA 90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines - Valley Industries Pressure Washer Premium Pump Oil - 1 Liter, Black, (PK-85490000) - Northstar Pressure Washer Pressure Gauge - 5000 PSI, 3/8in. Fitting --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/23326016-4000-psi-3-5-gpm-horizontal-replacement-pressure-washer-pump](https://www.desertcart.tn/products/23326016-4000-psi-3-5-gpm-horizontal-replacement-pressure-washer-pump) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-11*