What Size Pressure Washer Do I Need?

What Size Pressure Washer Do I Need

In this post, I will answer your question of what size pressure washer do I need so read on…

Earlier it used to take long hours of work to clean grimy concrete surfaces. It is not really practical to take out tough stains by scrubbing them by hand. Nowadays, there are power washers/pressure washers available for cleaning large surfaces of concrete like driveways and patios. They work by using a high pressured spray of water to scrub the concrete surface. 

They can resemble a hose but they have much more power to take out the dirt. It depends on the machine which kind of water or detergent it requires. Psi(pounds per square inch) is the unit of measurement for the pressure of water. GPM(gallons per minute) is used to measure the flow rate of the machine. Psi and GPM work together to produce enough pressure and flow. It is also necessary to manage the source of water that is able to keep up with the washer’s flow rate. The pressure washer you are going to buy must have the flow rate and pressure combination that you need. You must take a look at operating tips and precautions. 

What Size Pressure Washer Do I Need?

There are two types of size pressure washers. They can be either electric or gas-powered. Electric washers can be bought with as much as $150 in your pocket. They are easily maintained. Their power is also less than those of gas-powered washers. If you are using an electric washer, make sure its PSI is 2500 and the rate of water flow is at least 2.5 GPM. This setting will let the washer clean the dirt immediately and efficiently. 

There are different sizes available for gas-powered washers in the market. Large models are capable of 3500 PSI with more than 4GPM flow while smaller ones have an average PSI of 2000-2800 and as much as 2.8GPM. Power washers have to be used carefully. Consider your needs while buying them because they can damage household surfaces. Determine whether you need a small-sized washer or a large one. You can decide so while evaluating the washer models. 

Most of the house cleaning jobs are done if you are owning a small gas-powered pressure washer. It is true that the process of cleaning concrete is way faster while using large washers but they are too strong for many other cleaning operations. You can buy whichever washer you like at a good price for routine cleaning and then rent it. When you are buying the washer, make sure it comes with the right nozzles and appropriate accessories. If it doesn’t, purchase these items separately because, without these, the washer cannot work. A fine and strong spray comes out of the high-pressure nozzle. You have to apply detergent to a low spray nozzle while a wide nozzle sweeps for rinsing. 

Before starting to use the washer, ensure that your home is getting enough water or a low-pressure municipal supply. If the inflow of water is insufficient, the washer can suffer damage and it might stop working at all.

Most people have observed that generally, a 3000 PSI washer with a 3GPM flow rate is perfect for concrete cleaning. With this range, no concrete or brick goes without the wash. There has to be a different setting if you have to clean the outside of the building. A PSI of almost 1500 and a flow rate of 1.8 GPM are appropriate. This will not provide any damage to the paint. 

Starting the process, clear the area of excess debris and cover the walls and doors that are susceptible to damage or paint removal. Afterward, use a brush to work in a degreaser. An appropriate wand tip should be used to cover the area in detergent. Take a break of five minutes before the detergent dries out. Now is the time for your pressure washer to do its work. It will clean away all marks or grease and detergent in a matter of seconds. You can use the trick of working from three to four inches away with the wand in order to remove stubborn stains like paint.

  • Precautions

It has been proved through studies that if a stream of water is as strong as 2500 PSI, it can rip up concrete. Therefore, start spraying the concrete at a safe distance away. Stay mindful of anything that stands the chance of moving. If you are working with asphalt or gravel, use a light spray only. Avoid the stenciled concrete. If you are not careful enough with the washers, they can ruin the design of concrete. Do not try to remove any sealers or coatings because the top layer of concrete can get damaged this way. 

  • Tips for concrete cleaning

Most homeowners protect the concrete from damage by sealing it. There are different options available for you to get the sealers. Some of them leave no trace of treatment while others leave a protective high gloss. It usually takes a small time to clean the concrete if the dirt and grease stick only to the sealer. 

It is advisable to take care to overlap your spray as you are doing the cleaning because otherwise, you may leave the streaks. If you are working with the washer outside of the house, make sure you cover your plants well. You can also use a plant-safe detergent. If properly handled and used, a pressure washer is a wonderful asset that can be used to make your life easier and more comfortable. It can save you plenty of hard work and time as well. 

What Size Pressure Washer Do I Need


Can you damage concrete by power washing? 

The concrete surface can be easily damaged by power washing. The damage is quite visible from water pressure at such a level where even light-duty power washers can work. 

What do you spray on concrete before pressure washing? 

It is important to ensure proper cleansing. For that, spray the concrete with the bottle of spray degreaser. Make sure you keep a distance of 6 inches from the surface. You can use either a stiff brush or pressure washer attachment tool to scrub degreaser into concrete. 

Are electric pressure washers any good? 

Electric models have certain advantages like they can get rid of light stains and dirt from concrete. They can also destroy items around your home. But the bad part is that they may not have enough oomph for heavy stains. 

Does white vinegar clean concrete? 

If you are looking for a natural and authentic cleaner, it is a good option to use vinegar or baking soda. First, let the concrete surface be sprayed with the mixture. Now, wait for thirty minutes until you scrub and rinse the concrete. 

Will straight bleach harm concrete? 

It is safe to use bleach on concrete. The sturdy material of concrete stays safe while using bleach. You can efficiently disinfect concrete by using bleach. It is usually recommended to use bleach in a space that is well-ventilated. The reason is that the fumes of bleach can be overwhelming. 


It is important to use the right model of pressure washer to get safe and superior results. With little maintenance and comparatively less price, electric washers are available in the market. They are able to create 1300-1700 psi with 1.5 GPM. The ideal pressure washers will have psi between 2000 and 3000 with a flow of as much as 2.5gpm to get rid of dirt and stains. 

References: Pros and cons of gas and electric pressure washers

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