Pressure Washer Pump, 4000 PSI 4.4 GPM, 1" Horizontal Shaft Three-Layer Plunger, Direct Drive Replacement Kit Compatible with Simpson, MorFlex & Major Brands

Powerful 4000 PSI High Pressure Washer Pump for Gas EnginesUpgrade your cleaning equipment with this robust high-pressure triple-layer pump, delivering up to 4000 PSI and a stream rate of 4.4 GPM. Designed for compatibility with leading gas engines including HND GX340 (11HP), GX390 (13HP), PowerPro 4240, RSV4G40, Devilblis EXHP3640, and Annovi Reverberi RKV4G36, this pump is perfect for both residential and commercial applications.Global Fit: 1" hollow shaft mounts easily to most 13 HP horizontal gas engines, making this an ideal replacement for Cat, General, AR, Simpson, Ryobi, Subaru, and Craftsman power washers.Heavy-Duty Construction: Features a forged brass manifold for superior strength and corrosion resistance, and a die-cast anodized crankcase with large cooling fins for best heat dissipation.Engineered for Longevity: Hardened, precision-ground crankshaft and strengthened, one-piece alloy aluminum connecting rod ensure maximum durability and longer service life.Superior Components: Ceramic plunger increases resistance to pitting and wear; ball and roller bearings provide maximum life and load distribution. Includes an in-line water filter and fixed rate detergent injector for thorough cleaning.Safe & Easy Operation: Equipped with a thermal relief valve, easy start valve, pressure relief valve, reinforced valve cage, and over-pressurization jam nut.Quick Connect Setup: Female 3/4" water inlet and 3/8" quick disconnect outlet for fast, leak-free connections. Installation kit included for effortless setup.Restore and boost your pressure washer's performance with this professional-grade pump—engineered for efficient, reliable cleaning of driveways, siding, vehicles, and industrial equipment. Note: Unloader must be installed before use.

• High-Performance 4000 PSI @ 4.4 GPM Output: This pressure washer pump delivers powerful cleaning performance with up to 4000 PSI and 4.4 GPM, making it ideal for heavy-duty residential and commercial cleaning tasks like driveways, decks, and equipment.
• Universal Fit for Most Gas Pressure Washers: Engineered with a 1-inch horizontal shaft, this direct drive pump is compatible with gas engines in the 10-15 HP / 270-420cc range, fitting popular brands including Simpson, PowerPro, AR, and MorFlex models.
• Durable Three-Layer Plunger & Brass Head: Built with a three-layer plunger design, blackened crankcase, and sturdy brass pump head, this replacement pump ensures reduced vibration, consistent output, and long-lasting durability in demanding conditions.
• Adjustable Unloader Valve for Pressure Control: The integrated adjustable unloader valve allows precise pressure regulation, letting you dial in the perfect setting for everything from gentle deck cleaning to intense concrete stripping.
• Easy Maintenance with Sight Glass & Complete Kit: Features an integrated oil sight glass for hassle-free level checks and advanced oil seals. Includes all necessary mounting hardware, 3/4" garden hose inlet, and 3/8" quick-connect outlet for fast installation.