Best Gas Pressure Washer Unloader Valves of 2026

The OEM Technologies 90028 Pressure Washer Pump Kit is an easy-to-install kit that can save money by replacing the pump instead of buying a whole new power washer. It can support 3300 PSI at 2.4 GPM to wash walls, fences, sidewalks, and vehicles. The kit includes a siphon tube with filter, mounting bolts, shaft key, and instruction booklet to ensure compatibility with most* gas-powered pressure washers. The pump features a maintenance-free crankcase, fully anodized die-cast aluminum construction, and a Thermal Relief Valve (TRV) to protect the pump from overheating while in bypass mode.

The TOOLCY 3/4" Shaft Horizontal Pressure Washer Pump is a high-quality and efficient pump that can replace pumps from various brands. It has a maximum pressure of 3100 PSI at 2.5 GPM and comes with 3 nozzle tips for best cleaning performance. Made of die-cast aluminum with deep surface treatment, this pump is rust-resistant and maintenance-free. It is easy to start and can be set up in 5-10 minutes. The pump is also compatible with various pressure washer models from brands like Honda, Simpson, and Karcher.

Reborn your power washer with YAMATIC Pressure Washer Pump. This pump can replace your old pump and save you money. It has a maximum pressure of 3000 PSI, a flow rate of 2.5 GPM, and runs at 3400 RPM. It is compatible with most rear outlet 180-196cc at 6.5-7hp engine RYOBI, Honda, Briggs and Stratton, Subaru, PowerStroke, Craftsman, Simpson, Homelite, and other brands. The double seal system, upgraded technical surfacing piston and bearing, and thermal relief valve make for extended durability. The adjustable unloader allows you to increase or reduce pressure to fit your engine's requirements better. The maintenance-free crankcase means you never have to change the gasoline. It is easy to install in 5-10 minutes and comes with a siphon tube with filter, mounting bolts, shaft key, and instruction booklet.

The TOOLCY Pressure Washer Pump is a high-performance replacement pump designed to refurbish your pressure cleaner. With a maximum pressure of 3100 PSI and a flow rate of 2.5 GPM, this pump delivers top performance for a variety of cleaning tasks. It is compatible with a wide range of pressure washers, including models from Homelite, Ryobi, PowerStroke, Husky, Craftsman, and Simpson. The pump comes with two pressure washer couplers, making installation quick and easy. It also features a double seal system to prevent leakage and a thermal relief valve to protect against overheating. With its maintenance-free crankcase and pre-filled oil, this pump is hassle-free and ready to use. Whether you need to clean rooftops, sidewalks, cars, or gardens, the TOOLCY Pressure Washer Pump is a reliable and convenient choice.

The Canpump Pressure Washer Triplex Pump is a high-quality replacement pump kit that is compatible with standard SAE J609 mounting flange for up to 6.5 hp direct-drive gasoline engines with ¾" horizontal shafts. With 3,000 psi at 3.1 gpm, this pump has a forged brass and anodized aluminum construction with cooling fins, 15 mm ceramic-coated solid stainless steel plungers, German-made packing seals, detachable and pressure-adjustable internal bypass unloader valve with detergent injector and built-in water filter, and triplex plunger pump mechanism. Additionally, it has a sight glass for oil inspection and comes with a detergent tube with strainer, set of extra O-rings, and operating manual with spare parts list.

The Simpson Manifold Replacement Kit is designed to help you quickly fix your pressure washer pump and get back to your cleaning tasks with ease. This kit serves as an original equipment replacement specifically for the manifolds used in the 510020 and 520006 OEM Technologies axial cam pumps, ensuring you get the right fit for your gas pressure washer. Before buying, make sure to check your pump model number for compatibility to avoid any issues. The kit includes all necessary parts like valves, seals, and fittings, so you have everything needed to repair your pump efficiently and keep your power washer running smoothly.

The Topfurn Pressure Washer Valve is designed for easy use with most pressure washers thanks to its 3/8-inch quick-connect fittings, which work with over 90% of brands. You’ll appreciate the leak-proof design, featuring a brass core and triple-seal Teflon tape that keeps water contained even after many uses. Built from durable stainless steel, this valve handles high pressure up to 4500 PSI and extreme temperatures, promising long-lasting performance. The ergonomic handle lets you quickly stop water flow without turning off your machine, making nozzle changes faster and protecting your pump from wear. This valve kit makes pressure washing smoother and more reliable for you.