You may be surprised to know that a pressure washer uses less water than a garden hose. A pressure washer will use 2 gallons of water per minute, whereas a garden hose uses 20 gallons per minute.
Yup, using a pressure washer helps save water.
The amount of water you’ll use depends entirely on the job at hand. If you are doing a small join such as washing a car, then a light-duty pressure washer with water pressure ranging from 1400 to 1750 PSI and a water flow rate ranging from 1.2-1.8 GPM.
If, for example, you are going to be cleaning your driveway, you’ll need a medium-duty pressure washer, which has a PSI range of 2300-2500 and a GPM range of 2.2-2.3.
This may sound crazy, but a lightweight pressure washer will consume ~685 times less water than your garden hose.