--- product_id: 17366072 title: "Learn More" brand: "simpson" price: "NZ$2552" currency: NZD in_stock: true reviews_count: 9 category: "Simpson" url: https://cook.desertcart.com/products/17366072-learn-more store_origin: CK region: Cook Islands --- # 3.5 GPM flow rate 3800 PSI max pressure 1" shaft with SAE bolt pattern Learn More **Brand:** simpson **Price:** NZ$2552 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your clean game with pro-level pressure! ## Quick Answers - **What is this?** Learn More by simpson - **How much does it cost?** NZ$2552 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [cook.desertcart.com](https://cook.desertcart.com/products/17366072-learn-more) ## Best For - simpson enthusiasts ## Why This Product - Trusted simpson brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Build:** Dual oversized ball bearings reduce friction for long life - • **Universal Fit:** SAE standard bolt pattern fits many gas-powered washers - • **Easy Oil Monitoring:** Sight glass lets you check oil levels without hassle - • **PowerBoost Technology:** Delivers peak pressure for faster, deeper cleaning - • **Adjustable Pressure Control:** Hand knob lets you dial down power for delicate tasks ## Overview The AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pump Kit is a robust, easy-to-install upgrade for gas-powered pressure washers with horizontal engines. Delivering up to 3800 PSI and 3.5 GPM, it features PowerBoost Technology for enhanced cleaning power, a 1" shaft with SAE bolt pattern for broad compatibility, and a sight glass for effortless oil monitoring. Built with durable brass components and oversized ball bearings, this pump ensures long-lasting, efficient performance for industrial and heavy-duty cleaning tasks. ## Description Engineered to surpass expectations, the 90038 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 3800 PSI at 3.5 GPM. The 90038 is designed with dual oversized ball bearings to reduce friction and allow for long lasting performance in the toughest cleaning environments. The 90038 features a stainless steel integrated unloader featuring our easy-start system. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility) Review: Replacement - Easy to install. Matched right up with the old pump. Working as should. Review: Good quality - Fits perfectly on the dewalt 3800 PSI power washer ## 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 3800 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 | B00TQLMPF2 | | Best Sellers Rank | #255,292 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #160 in Pressure Washer Pumps | | Brand | SIMPSON | | Brand Name | SIMPSON | | Color | Black | | Customer Reviews | 4.3 out of 5 stars 401 Reviews | | Flow Rate | 3.5 gpm | | Global Trade Identification Number | 00879399002083 | | Included Components | Pump Kit | | Item Dimensions L x W x H | 12"L x 10"W x 7.5"H | | Item Type Name | Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines | | Item Weight | 14 pounds | | Manufacturer | simpson | | Manufacturer Part Number | 90032 | | Manufacturer Warranty Description | 5 year warranty | | Material | Brass | | Material Type | Brass | | Maximum Lifting Height | 22 meters | | Model Number | 90038 | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Gas Powered | | Product Dimensions | 12"L x 10"W x 7.5"H | | Product Style | 3800 PSI at 3.5 GPM | | Specific Uses For Product | Pressure washing, Cleaning surfaces, Vehicle washing, Wall cleaning, Sidewalk cleaning | | Style | 3800 PSI at 3.5 GPM | | UPC | 879399002083 | | Unit Count | 1 Count | ## Product Details - **Brand:** SIMPSON - **Color:** Black - **Global Trade Identification Number:** 00879399002083 - **Item Weight:** 14 pounds - **Material:** Brass - **Maximum Flow Rate:** 3.5 gpm - **Maximum Lifting Height:** 22 meters - **Power Source:** Gas Powered - **Product Dimensions:** 12"L x 10"W x 7.5"H - **Style:** 3800 PSI at 3.5 GPM ## Images ![Learn More - Image 1](https://m.media-amazon.com/images/I/71UfvYTtB6L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Replacement *by G***T on September 16, 2025* Easy to install. Matched right up with the old pump. Working as should. ### ⭐⭐⭐⭐⭐ Good quality *by A***W on July 10, 2026* Fits perfectly on the dewalt 3800 PSI power washer ### ⭐⭐⭐⭐⭐ Works as described *by G***E on July 6, 2025* Fast install works great on dewalt 3800 psi with Honda 270 engine ## Frequently Bought Together - AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" 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) , Red --- ## 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://cook.desertcart.com/products/17366072-learn-more](https://cook.desertcart.com/products/17366072-learn-more) --- *Product available on Desertcart Cook Islands* *Store origin: CK* *Last updated: 2026-09-09*