What is the Difference Between a Power Washer and a Pressure Washer?
Although the two names are used interchangeably, they’re not the same thing. “A power washer uses pressurized warm or hot water, while a pressure washer uses cold water,” says Kerry Cohen, the pressure washer merchant at Lowe's. “A power washer’s hot water works well for ground-in stains and is typically used by commercial cleaners. Most DIY customers, because they’re hooking up a machine to their hose outside, are going to want to use a pressure washer."
Which one to buy depends on what and where you’ll be cleaning. Power washers are typically used for large-scale, commercial jobs because they offer more cleaning power. But with that power comes a higher price for the machine and the potential for damaging surfaces if the machine isn’t used properly.
What Brands and Models Work Best for Projects Around the House?
The best product for home projects is the one that’s easiest for you to use. “We’re seeing the shift from gas to electric or battery-powered tools. An electric pressure washer needs a power source, but beyond that it’s all about ease of use. You plug it in and turn it on,” says Kerry. Check out the offerings from Greenworks, they’re geared toward home DIY projects.
What are PSI and GPM?
PSI is a measure of air pressure per square inch and GPM stands for gallons per minute. But what does that mean? “Think of PSI as the thing that breaks up dirt and grime and GPM as the thing that washes that dirt and grime away,” says Kerry. “We carry pressure washers that range from 1,700 to 3,000 PSI units. For light DIY jobs, a machine with 1,700 to 2,100 PSI should work well. The 3,000 PSI machine also produces more GPM and it’s a heavier machine.”
What Are Cleaning Units?
Cleaning units are a measure of a pressure or power washer’s power. It’s calculated by multiplying PSI and GPM. The higher the cleaning unit, the more effective the machine.
How Do You Know What to Wash and What Not to Pressure Wash?
It might seem like common sense, but never wash anything that’s alive. “Don’t pressure wash your pets, plants, trees, and definitely don’t spray another person with a pressure washer,” says Kerry. From there, the surface you’re washing should determine the nozzle you use and the setting of the machine. A direct spray offers more power than a fan spray.
What Are Some Best Practice Tips for Using a Pressure Washer?
Get to know your machine. Read the user’s manual and familiarize yourself with the wand tips. If you don’t want to read the how-to, Kerry recommends checking our product pages for a video tutorial for your machine. “Beyond that, check your PSI settings before starting a job and test the pressure and flow on your driveway before starting a project,” says Kerry. “If you’re pressure washing your home’s siding, don’t point the spray up the seam of the siding. Water can get underneath the siding and can rot the wood behind.”
Are There Any Safety Considerations to Keep in Mind?
Never look into the wand and follow any safety instructions for machine and cleaners you add to the tank. “If you add a cleaner or chemical, remember there might be blowback from the spray. Practice caution, and make sure you’re using the recommended skin and eye protection,” says Kerry.
Is There a Better Time of Year to Pressure Wash?
Fall is an ideal time to pressure wash to get outdoor spaces ready for winter. The weather’s cooled off so it’s more pleasant working outside. Pressure washing season typically wraps up about mid- to late October, when temperatures dip into the freezing range. Spring is also a good season for pressure washing.
What is the Price Range for a Pressure Washer?
You can get a lot for your money, but a good pressure washer for DIY projects costs between $99 and $399. There’s something in that range for everyone. Obviously if you're a professional and will be using this machine fairly regular, it might be smart to opt for the best quality model you can afford.