BESTSELLER
Garvee 4000 PSI Triplex Plunger Pressure Washer Pump - Universal 1" Shaft Replacement for Honda GX270/GX390, Simpson, DeWalt, AR Blue Clean - 4.4 GPM Commercial Grade Power Washer Pump with Unloader Valve
BESTSELLER
Garvee 4000 PSI Triplex Plunger Pressure Washer Pump - Universal 1" Shaft Replacement for Honda GX270/GX390, Simpson, DeWalt, AR Blue Clean - 4.4 GPM Commercial Grade Power Washer Pump with Unloader Valve
BESTSELLER
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Couldn't load pickup availability
- Universal Fit: Compatible with 1" horizontal shaft, 10–15HP gas washers; replaces many major brands.
- High Performance: Up to 4000 PSI, 4.4 GPM with adjustable unloader for versatile cleaning.
- Easy Maintenance: Sight glass for quick oil checks—no dipstick needed, hassle-free oil changes.
- Complete Kit: Includes pump, flange bolts, shaft key, O-rings, air valve, and 5 nozzles for easy setup.
- Durable & Safe: Tough brass head, blackened crankcase, triplex plunger, plus built-in thermal relief for long life.
| Brand | GARVEE |
| Color | Black |
| Material | Aluminum, Brass |
| Power Source | Gasoline, Engine |
| Item Weight | 20 pounds |
| Maximum Flow Rate | 4.4 Gallons Per Minute |
| UPC | 198723435893 |
Shipping & Returns
Shipping Locations: GARVEE ships from warehouses located in the United States, prioritizing the warehouse closest to the customer.
Processing Time: Warehouse processing takes 1-2 business days, and shipping takes 2-4 business days.
Free Shipping Service: Free shipping is available in most mainland regions.
Accepted Payment Methods: GARVEE accepts payment methods such as credit cards, PayPal, and Klarna.
Payment Failure Handling: If a payment fails, customers should check their network, payment method, and bank settings, or contact customer support for assistance.
12-Month Warranty: GARVEE provides a 12-month warranty for all products purchased on their official website, covering quality defects.
Warranty Start Date: The warranty period starts from the date the customer receives their package.
Order Cancellation: Orders that have not been shipped can be canceled by emailing support@garvee.com for a full refund.
30-Day Return Guarantee: Customers can return products within 30 days of receiving their package for an exchange or refund if not satisfied.
Return Conditions: Products must be in brand-new, unused condition, including all original packaging and accessories.
Return Shipping Fees: If the return is due to customer reasons, the customer will bear the return shipping costs.
Garvee 4000 PSI Triplex Plunger Pressure Washer Pump - Universal 1" Shaft Replacement for Honda GX270/GX390, Simpson, DeWalt, AR Blue Clean - 4.4 GPM Commercial Grade Power Washer Pump with Unloader Valve

Upgraded Design
Hose Quick Connect
Connector Inlet: 3/4''NH Garden Hose
Connector Outlet: 3/8'' Quick Connect
Thermal Release Valve
Prevents overheating, ensuring the longevity of the pump's internal components
Chemical Injection
Injection cleaner or other for better cleaning
Pressure Gauge Connection
Connect a pressure gauge for clear pressure monitoring



CAUTION:
1. ONLY Fit 1'' Shaft Horizontal Engines.
2. With a 3/8" quick plug, if it is not suitable for the connector of your PRESSURE WASHER HOSE, please purchase the adapter coupler connection separately.
3. In order to protect the spring, the pressure is not set to the maximum value at the factory, please adjust the pressure with the regulator.
4. Only suitable for COLD WATER use.
Some Tips To Choose The Compatible Replacement Pump:
1. Match Engine Orientation.
Horizontal Engine: The pump is installed horizontally onto the engine.
Vertical Engine: The pump is installed vertically below the engine.
2. Match your machine's PSI And GPM.
Engine power and pump performance need to be matched for optimal machine performance.
3. Match the Engine Shaft Diameter.
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.
4. Match Current Pump Outlet Connection.
This will ensure that your attachments are compatible with the new pump.
Specifications
| Brand | GARVEE |
| Color | Black |
| Material | Aluminum, Brass |
| Power Source | Gasoline, Engine |
| Item Weight | 20 pounds |
| Maximum Flow Rate | 4.4 Gallons Per Minute |
| UPC | 198723435893 |
Reviews
I own a small pressure washing business, and my MorFlex pressure washer pump started leaking and losing pressure after two seasons. I almost bought a new machine, but a mechanic friend suggested I try replacing the pump instead. This direct drive replacement kit was the best decision. The 4000 PSI @ 4.4 GPM output matches or exceeds my original specs. The 1-inch horizontal shaft aligned perfectly with my 13 HP engine – no modifications needed. What impressed me most is the three-layer plunger design. The original pump had standard plungers that wore out quickly; these feel much more robust. The blackened crankcase and brass head suggest serious durability, and after a month of daily commercial use, it's holding up flawlessly. The adjustable unloader valve is precise – I can dial down to 1500 PSI for soft washing house siding or crank it up to full 4000 PSI for stripping paint off concrete. The oil sight glass is a thoughtful feature that makes maintenance checks effortless, and the included mounting hardware made installation a breeze.
I've only put 28 hours on this pump. Working great. My suggestion is to change the fluid often.
Worked for 12 days 6 hrs a day. Then sight glass oil windows both back out and drained all pump oil out. Caught it in time and glued in place with gasket seal. So far so good.
Recently, I replaced the pump of my high-pressure washer with one of the highest quality available. This pump is extremely easy to install, requiring no effort and can be set up simply through basic operations. Moreover, it has a very high pressure, allowing for efficient and speedy cleaning. The efficiency keeps increasing!