TOOLCY 1" Shaft Pressure Washer Pump 4200 PSI – Horizontal 1" Shaft, Adjustable Unloader & Triplex Plunger

TOOLCY's 1" shaft triplex plunger pressure washer pump delivers up to 4200 PSI and an adjustable unloader for customized cleaning power.

This heavy-duty replacement pump is built for gas-powered washers with a horizontal 1" shaft (10–15 HP or 270–420 cc engines). Its fully anodized crankcase, brass pump head and triplex plunger design are engineered to run smoothly and resist wear. The red adjustment knob lets you fine-tune pressure for different tasks, while the packaged nozzles and standard fittings make installation and use straightforward.

How do I adjust pressure for different cleaning jobs?

Use the prominent red adjustment knob to increase or decrease discharge pressure without changing nozzles. For longevity and reliable performance, aim for recommended working parameters rather than always running at maximum output.

• Red knob offers on-the-fly pressure control up to 4200 PSI.
• Recommended working pressure: ~3400 PSI at 3400 RPM for extended life.
• Includes 5 nozzles for varied spray patterns and cleaning intensity.
• Unloader prevents overpressure when trigger is released.

Which engines and pumps is this TOOLCY unit compatible with?

The pump is designed for horizontal 1" shaft gas engines commonly found on 10–15 HP or 270–420 cc power washers. It follows industry SAE flange dimensions and pairs with many OEM models when specs match.

• Works with engines like Honda GX340, GX390, GX270 when orientation and shaft size match.
• Compatible with Simpson, DeWalt, AR/Annovi Reverberi models sharing similar specs.
• Standard 3/4" garden-hose inlet and 3/8" quick-connect high-pressure outlet fittings.
• Verify PSI, GPM, shaft diameter and inlet/outlet connections before installation.

What durability features extend the pump's service life?

TOOLCY uses durable materials and a proven internal layout to reduce wear and support continuous operation. The pump's construction focuses on corrosion resistance, strength and simplified maintenance.

• Fully anodized black crankcase improves corrosion resistance and appearance.
• Solid brass pump head resists wear from pressurized water and detergents.
• Triplex plunger configuration produces smoother flow and balanced loading.
• Advanced sight glass and improved oil seals eliminate the need for a dipstick.

How easy is it to install and maintain this replacement pump?

Installation is straightforward when your machine matches the pump's mounting and shaft specifications. Routine checks and proper operating pressures will keep the unit performing well for many seasons.

• SAE-compliant flange and 1" shaft hole match standard mountings for many models.
• Pre-fitted inlet/outlet sizes reduce the need for adapters in most setups.
• Complete accessory kit with five nozzles speeds setup and expands cleaning options.
• Easy visual oil sight glass simplifies maintenance checks.

Who is this for: This TOOLCY pump is aimed at homeowners and light-commercial users who need a robust, serviceable replacement for a horizontal-shaft gas pressure washer. If you run a 10–15 HP or 270–420 cc engine and want a durable pump with adjustable pressure and standard fittings, this offers a practical upgrade. Confirm engine orientation, shaft diameter, PSI and GPM compatibility before buying to ensure a smooth swap and reliable performance.