How to choose a pressure washer

How to choose a pressure washer? We’ll show you which pressure washer is best for your job.

What is a pressure washer?

Pressure washers pumps water at an increased pressure and speed of water to clean many different surfaces. A typical pressure washer will deliver 50% more power and use 80% less water than a garden hose.

Water blasters can be electrical or petrol powered, and deliver cold or hot water. Most pressure washers come with accessories such as different nozzles, brushes and detergent pickups.

Water blasters are measured by their PSI (pounds per square inch).

1000 – 4000 PSI pressure washers are good for general domestic jobs. Such as washing cars or decks and washing down siding. Washers in this range are usually electrically powered. Being electrically powered means that you are restricted to places with electricity and the length of your electrical cord.

The next step up in power is around 2500 – 4000 PSI. To get this sort of power the washers are powered by petrol engines. Petrol powered pressure washers are much more versatile than electric models. With petrol engine washers you are able to use them almost anywhere.

Bigger and more powerful pressure washers are over 4000 PSI. Some of these models can also produce hot water to clean tougher stains and chemicals. Models over 4000 PSI are used by professionals for commercial cleaning jobs.

Stanley pressure washer

Which pressure washer is best for you?

Questions to ask yourself are:

How often will you use a pressure washer?  If your only going to use your pressure washer on the odd occasion, maybe hiring a pressure cleaner is your best option. You may want to regularly clean your car or a outdoor deck. Then a electrical powered pressure washer could be the best model for you. Are you going to be using your pressure washer on a daily or weekly basis. A petrol model will be the model for you as these are more suited to commercial applications.

How big a job do you want use the pressure washer for?  The size of the area or job will also help you determine which model is best for you. If your only going to clean your car or have a small deck area, a electrical 1000 – 2000 PSI model would be suitable. Petrol powered washers are better for large jobs such as driveways and trucks and tractors.

What is it that you are trying to clean?   Electrical pressure washers for backyard decks or patios and cars.  For ground in dirt or oily stains a petrol power washer is the way to go. Commercial cleaners will often have pressure washers that heat the water to around 90 degrees Celsius to clean difficult stains without using harsh chemicals.

Do you have access to electricity and water?   Access to water and electricity allows you to use a electrical pressure washer, but this doesn’t mean you can’t use a petrol powered washer. If the area that needs to be cleaned is out of reach of your power cord and or hose, use a petrol powered washer.

RECOMMENDED PSI FOR APPLICATIONS

What’s the difference between PSI and GPM?

PSI is the pounds per square inch of pressure a washer puts out and is the usual method of rating pressure washers. Another measurement that helps determine the power of a pressure washer is GPM which stands for gallons of water used per minute. You get a deeper clean from a pressure washer with higher pressure and more water. Hence the best all round pressure cleaner has a high pressure output and uses more gallons per minute.

For example, you have a large driveway to clean. Using a pressure washer with a high PSI but low GPM will take a lot longer than using a high PSI and high GPM. A pressure washer with 3000 PSI and 4 GPM would be the ideal washer to clean your average driveway.

The PSI is what gets the dirt and grime off your surface, GPM is what washes the grime away.

Accessories

Most pressure washers come with accessories such as different nozzles, brushes and scrubbers.

Interchangable nozzles allow you to apply different amount of pressure to your cleaning surface. Red and yellow nozzles are hard and fast cleaning. Green nozzles are not as hard and white nozzles offer the widest spray. Black nozzles are generally for applying detergent and very light pressure. Turbo nozzles operate in a spinning fashion and increase the cleaning efficiency.

PRESSURE WASHER NOZZLES

Brushes are good for washing your car and usually have a spinning action.

Scrubbers are for cleaning large flat surfaces, such as decks, driveways and roofs.

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Pressure washer safety

Pressure washers exert high forces when in operation. Always use two hands, don’t point the lance at people or animals. Test surfaces to determine pressure required for the job. Don’t blast electrical wires or power points. Keep the nozzle moving to avoid cutting into the surface. Take extra precautions when using a ladder or on a roof.

Don’t use petrol or diesel powered pressure washers in enclosed areas.

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Which pressure washer should you choose?

If you only have small, lightly soiled surfaces around the home, a electric pressure washer is for you. These are light and easy to handle.

You need a petrol powered pressure washer for your larger jobs. The PSI and GPM will depend on the type of jobs you want to carry out.

If you are going into the pressure washing business, you’ll need an industrial model.

I hope this has helped you choose a pressure washer for your specific needs.

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