--- product_id: 350789632 title: "TOOLCY 1\" Shaft Pressure Washer Pump 4400 PSI with Adjustment Unloader | 4.2 GPM Horizontal Gas Power Washer Replacement, Direct Drive Triplex Plunger Pump" brand: "toolcy" price: "¥98242" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/350789632-toolcy-1-shaft-pressure-washer-pump-4400-psi-with-adjustment store_origin: JP region: Japan --- # 4.2 GPM flow rate Adjustable unloader valve 4400 PSI max pressure TOOLCY 1" Shaft Pressure Washer Pump 4400 PSI with Adjustment Unloader | 4.2 GPM Horizontal Gas Power Washer Replacement, Direct Drive Triplex Plunger Pump **Brand:** toolcy **Price:** ¥98242 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your cleaning game with TOOLCY’s powerhouse pump! ## Quick Answers - **What is this?** TOOLCY 1" Shaft Pressure Washer Pump 4400 PSI with Adjustment Unloader | 4.2 GPM Horizontal Gas Power Washer Replacement, Direct Drive Triplex Plunger Pump by toolcy - **How much does it cost?** ¥98242 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/350789632-toolcy-1-shaft-pressure-washer-pump-4400-psi-with-adjustment) ## Best For - toolcy enthusiasts ## Why This Product - Trusted toolcy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Anodized aluminum & brass pump head for unmatched durability - • **Plug & Play Setup:** Standard 1" shaft & SAE mounting for quick, hassle-free installation - • **Maintenance Made Easy:** Pre-filled oil with sight glass for effortless monitoring and longer pump life - • **Powerhouse Performance:** Max 4400 PSI & 4.2 GPM for pro-level cleaning power - • **Custom Pressure Control:** Adjustable unloader valve for tailored cleaning & engine protection ## Overview The TOOLCY 1" Shaft Pressure Washer Pump delivers up to 4400 PSI and 4.2 GPM, engineered with a durable triplex plunger design and premium anodized aluminum and brass components. Featuring an adjustable unloader valve for precise pressure control and a pre-filled oil system with sight glass, it ensures long-lasting, efficient performance. Compatible with 270-340cc horizontal gas engines, this pump offers easy installation and versatile cleaning power for residential and light commercial use. ## Description Compatible with: Simpson 40224, 40225, 40226, DeWalt DXPW3035, DXPW3535, DXPW3935, AR Annovi Reverberi RKV3G27, RKV3G34, RKV4G36, RSV4G40, Devilbiss EXHP3640, and more power washers with GX270 GX340 GX390 engine. Quality Direct Drive Power Washer Pump Fits Horizontal 1 inch Shaft Pressure Washer Engine : The pump is installed horizontally onto the engine. : The pump is installed vertically below the engine Engine power and pump performance need to be matched for optimal machine performance The shaft diameter for vertical pumps is typically 7/8 inches. The shaft diameter for horizontal pumps is either 3/4 inches or 1 inch (Please refer to the engine specifications to confirm This will ensure that your attachments are compatible with the new pump. (If the connection does not match, you may need to use adapters or modify the setup Gas Pressure Washer Pro Gas Power Washer Foldable High Pressure Washer Gun M22 Pressure Gun Short Adjustable Pressure Gun Foam Cannon and Gun Kit TOOLCY has been manufacturing power washers, pressure washer accessories, and garden hoses for over a decade. We're dedicated to delivering top-notch quality. Our founder, a mechanical engineer, loves pressure washing tech. While cleaning his home, he noticed that existing pressure washers were either too weak or didn't last long. That's why he started TOOLCY—to make high-performance, durable pressure washers for pros and everyday users. Check the engine orientation is horizontal or vertical : Match the PSI and GPM of the replacement pump to the old one : Verify the engine specifications to determine the pump shaft size: 3/4", 7/8", or 1" ：Check to see if the old pump outlet connection is front or rear and M22-14mm or 3/8" QC : Compatible with 270-340cc high -pressure washers : Standard 1" shaft and SAE bolts for easy fit : Adjustable pressure to match your engine : Pre-filled oil, sight glass for oil check : 150-hour life, 19%-46% longer than standard : Double seals and thermal relief valve. : Die-cast aluminum with anti-rust finish : 5-10 min install with key, nozzle : Pre-filled oil, no oil changes needed We began with a vision to simplify cleaning tasks. Through innovation and customer focus, we've grown into a leading pressure washer pump brand. We love creating powerful, efficient pressure washer pumps that make cleaning easier and more effective, enhancing lives and saving time. Our pumps offer a perfect blend of power, efficiency, and durability. Innovative features and high-quality materials set us apart. ## Features - Renew Your Gas Pressure Washer: Quality triplex pressure washer pump with big save. Designed for horizontal engine and relife your power washer with Max 4400 PSI and 4.2GPM, recommend working pressure 3400PSI@3400RPM for longer life. Service your residential and light commercial pressure washing for driveway, decks, fences, sidewalks, vehicles, and more - OEM Quality Power Washer Pump: Fully anodized black crankcase with solid brass pump head can greatly improve the strength and improve the service life. The triplex design can make the pump run more smoothly, powerful and durable. Sight glass and advanced oil seal technology eliminates the need for a dipstick - Adjustable Unloader: This pump come with unloader could adjust your pressure output with best perfomance with your engine and best cleaning efficient for your workshop. Also could reduce pressure when you need engine switch to idle model for low noise and relax for a while - Easy Set Up: Pump flange comply with industry standard SAE mounting dimension, 1 inch shaft hole. Diagonal distance between holes is 6 1/2 inches. Distance between short side holes is 3 1/4 inches. Distance between long side holes is 4 1/2 inches. Comes with 3/4 inch garden hose inlet and 3/8 inch quick connect outlet for easy setup, renew your power washer. Fit most engine with 9-15HP or 270-340cc, test performance and pump replacement for Honda GX340 GX390 GX270, Briggs&Strattton, Simpson and so on - Oil Pre-filled: The sight glass helps you check the oil level easily, you can know oil levels are low or if water has clouded the oil. We recommend you to change oil every 60 hours running time. Note: This pressure washer pump only for COLD WATER use - Complete Nozzle Tips Set: Includes 5 nozzle tips to provide versatile spray patterns for different cleaning applications, allowing you to tackle various surfaces and cleaning tasks with appropriate pressure settings ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B097RCG4YN | | Best Sellers Rank | #20,283 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #13 in Pressure Washer Pumps | | Brand Name | TOOLCY | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (230) 4.4 out of 5 stars | | Flow Rate | 4.2 gpm | | Item Dimensions L X W X H | 13"L x 13"W x 7"H | | Item Weight | 9.12 kg | | Manufacturer | TOOLCY | | Material Type | Aluminum, Brass, Stainless Steel | | Model Number | 4000 PSI Max | | Power Source | Engine Powered | | Product Style | 4400 PSI Max | ## Product Details - **Brand:** TOOLCY - **Color:** Black - **Item Weight:** 9.12 Kilograms - **Manufacturer:** TOOLCY - **Material:** Aluminum, Brass, Stainless Steel - **Maximum Flow Rate:** 4.2 Gallons Per Minute - **Power Source:** Engine Powered - **Product Dimensions:** 13"L x 13"W x 7"H - **Style:** 4400 PSI Max ## Images ![TOOLCY 1" Shaft Pressure Washer Pump 4400 PSI with Adjustment Unloader | 4.2 GPM Horizontal Gas Power Washer Replacement, Direct Drive Triplex Plunger Pump - Image 1](https://m.media-amazon.com/images/I/71a13SgzWkL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ AMAZING PUMP! *by on Reviewed in the United States July 22, 2026* I'm new to the pressure washing business, my stock, 4400PSI 4.2GPM Predator pressure washer stock triplex pump failed on me. I don't have a large budget to purchase the name brand replacement pumps so I took my time and combed through more budget friendly pumps. I settled on the Toolcy because I liked what I seen from others. Well I cannot say enough about this pump. First off the cost 1000% in anyone budget, the replacement process was elementary, the pump fit 100% perfect and the power from this pump is out of this world. I use the glycerin gauge to set the pressure and the needle on the gauge never feathered or vibrated. It was rock solid the entire time. For anybody looking for a replacement pump, do yourself a favor and look into this product because you will not be disappointed! My only recommendation is maybe put a rubber gasket between the brass garden hose connection to whatever hose connection you use. ### ⭐⭐⭐⭐⭐ Works great with predator 4.2gpm 4400psi 420cc *by on Reviewed in the United States August 7, 2026* Needed to replace my pump on my predator 4400 4.2 gpm. This pump was very easy to install on my machine. Just watch a video if you’re unsure, you can find it. When I was sure it was attached correctly I fired er up and it was working GREAT! I’ve only used it lightly multiple days in a row so far so take that for what it is but it works with this machine. Good for a backup pump too ### ⭐⭐⭐⭐⭐ Easy to instal *by on Reviewed in the United States July 7, 2026* Fit perfect ## Frequently Bought Together - TOOLCY Pressure Washer Pump Max 4000 PSI 4.2 GPM, 1" Shaft Horizontal Gas Power Washer Pump Replacement, Direct Drive Triplex Plunger Replacement Pump with Pressure Adjustment Unloader, 5 Nozzle Tips - Raincovo Pressure Washer Gauge, 6000 PSI, 3/8 Inch Quick Connect, Pressure Gauge for Power Washer - Valley Industries Pressure Washer Premium Pump Oil - 1 Liter, Black, (PK-85490000) --- ## 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.jp/products/350789632-toolcy-1-shaft-pressure-washer-pump-4400-psi-with-adjustment](https://www.desertcart.jp/products/350789632-toolcy-1-shaft-pressure-washer-pump-4400-psi-with-adjustment) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-18*