Many, but not all of our residential/ commercial power washers have manual throttle control, which changes the water pressure from the nozzle. Use of the proper nozzle for the job will also provide a different pressure stream. The Prosumer models have an adjustable control valve to provide complete control of the water pressure. This will reduce the psi output, though the flow will remain the same.

The units have a factory-set PSI output(the rating on the unit: 2700 PSI, 3000 PSI, etc,) However, through nozzle changes or with throttle control, the PSI can be altered. Due to variation in engine speed, which is customer controlled with the throttle control, the PSI can vary. The OneWash TM PSI range is adjustable from 2,000-3,000 PSI by utilizing the PowerDial TM to customize PSI for every job.

Only cold water (less than 100F) should be utilized for Generac power washers.

The water supply must be adequate to handle more than 3.8 gallons per minute and no less than 30 PSI. Do not siphon standing water for the water supply. Ensure that you use only cold water(less than 100F).

Hard water deposits. like calcium or lime scale, could potentially damage the pump. To prevent damage to the pump due to hard water, we recommend following the instructions in your owner's manual for long-term storage pump protection, with regard to using pump saver or RV anti-freeze after each use.

The recommended nozzle tip for each job will depend on the PSI of the power washer. * Black-detergent/ soap nozzle * White-delicate rinse (lower pressure and higher flow) * Green- general purpose cleaning * Yellow- general rinsing * Red-maximum blasting

You should use a soap made for pressure washers. Liquid soap is fine -just make sure the soap is not acid based, as it could damage the pump. Always remember to put the pickup tube in clean water and flush the system after each use.

When detergent is no longer needed, we recommend ensuring that the siphon hose and pump are properly flushed accordind to the directions in your owner's manual to prevent damage to the other nozzles. Once the system has a been properly flushed, the detergent hose can be removed from the connection point of the pump and the desired pressure nozzle can be utilized. We recommend following these steps. as they are the safest to ensure there is no damage to the power washer or to the desired pressure nozzle.

We do not recommend any modifications to the unit. If additional detergent is needed the siphon can be submerged into an external container.

If detergent is not necessary for the job being performed, the detergent siphon hose does not need to be attached. You will want to ensure that the water supply hose and the high-presure hose are correctly attached before each use.

The siphon hose connects directly to the pump. The pump pressure provides the necessary suction to incorporate the detergent into the high-pressure water stream.

The onboard detergent tanks do not need to be utilized. You will want to ensure that the detergent siphon hose is properly submerged in the detergent container being used.

When utilizing a power washer, we require a minimun of 10 feet of unrestricted garden hose for proper water supply,and a 50-foot maximum. Any hose longer than 50 feet will allow too large of a pressure drop to properly supply the pump with water. This decrease in water pressure can damage the pump on the power washer. Damage done to the power washer's pump due to using an improperly sized hose will void the unit's warranty.

The consumer series utilize a M22 threaded connection. Professional models utilize quick-change hose connections.

The engines for our power washers are manufactured to our specifications by a partner overseas.

With proper maintenance . you can expect years of reliable service. Based on the many environmental and operational factors involved,we are unable to give an exact life expectancy for the engine.

Engine horsepower can very based on the unit and application. They feature a Generac OHV engine. When selecting a power washer, the most important thing to consider is cleaning power.Cleaning power is the Output Pressure PSI) multiplied by the Water Flow Rate(GPM)The higher the cleaning power, the more effectively it will clean.

Consumer units and the OneWash TM power washer feature an axial cam pump that is not serviceable. The pump has been prelubricated and sealed from the factory. It will require no additional maintenance for the life of the pump. Commercial and industrial units feature a serviceable Triplex pump. Triplex units can be serviced with oil changes and replacement of seals. Disassembly for cleaning is not recommended. Consult your owner's manual for more details.

Both rattngs are correct. Pump ratings of PSI and GPM, on the pump, are rated on test parameters and lab conditions. The GPM specifications, on the data plate, are based on the Power Washer Manufacturers Association (PWMA) performance rating.