How to Choose Pressure Washer: What to Know

A driveway covered in green algae, a car coated in road film and a patio that has not been washed in years all need the same tool, but not the same washer. How to choose pressure washer comes down to matching the machine to the job: the pressure and flow for the surface, the hose and nozzles for the reach, and the power source for where you clean. This guide walks through each choice, with three washers that show the range from a battery washer to a full electric machine.

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Below: the short answer, what PSI and GPM mean, hose and nozzle choices, and the washers that fit the job.

#	Product	Shop Score	Buy
1	Kärcher Pressure Washer K1700, CETA Certified	9.6/10	Buy on Amazon
2	Chemical Guys, PM2000 PRO Electric Pressure	9.6/10	Buy on Amazon
3	Cordless Car Washer, 1100PSI	9.3/10	Buy on Amazon

1

Kärcher Pressure Washer K1700, CETA Certified

KÄRCHER·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A CETA certified electric washer rated at 1700 PSI and 1.2 GPM, with 3 nozzles, a 0.5 gal detergent tank and never-flat wheels.

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Pros

• 1700 PSI and 1.2 GPM, CETA certified
• 3 nozzles: 15 degrees, turbo and 65 degrees
• 0.5 gal detergent tank
• 2 year limited warranty

Cons

• Weighs 20.7 pounds
• 17.25 by 16.5 by 33.0 inches; needs storage space
• Detergent tank holds 0.5 gal; refill for long washes
• No foam cannon included

2

Chemical Guys, PM2000 PRO Electric Pressure

Chemical Guys·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 2030 PSI and 1.77 GPM electric washer with a 25 ft flex hose, a 35 ft GFCI cord and 360-degree casters.

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Pros

• 2030 PSI and 1.77 GPM
• 25 ft flex hose and 35 ft GFCI cord
• 360-degree casters and onboard cable storage
• Universal connections fit foam cannons without adapters

Cons

• Warranty is 30 days through Amazon
• Weighs 19.78 pounds
• 14.5-amp 1680W motor; check the circuit first
• 17.56 by 10.25 by 10.75 inches; needs storage space

3

Cordless Car Washer, 1100PSI

WADADDY·9.3/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A battery powered cordless washer rated at 1100 PSI, with a 6-in-1 nozzle, 10-level pressure adjustment and a self-priming system.

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Pros

• 1100 PSI with 10-level pressure adjustment
• 6-in-1 nozzle for different spray patterns
• Self-priming; draws water from a bucket, container or tap
• Battery display shows the battery level

Cons

• No warranty term is stated
• Made for quick cleanups, not long washes
• 1 battery in the box; no spare
• Needs a bucket, container or tap for water

How to Choose Pressure Washer: The Short Answer

Start with the job. Cars, patio furniture and siding need a gentler wash, while driveways need more pressure and flow. Match PSI and GPM to the surface, then check the hose length, the nozzles and the detergent tank, and pick corded power or a battery washer that fits where you clean.

PSI and GPM: What the Numbers Mean

PSI is the pressure and GPM is the flow, and cleaning power comes from the pair, so compare the pair, not PSI alone. The Chemical Guys PM2000 PRO is rated at 2030 PSI and 1.77 GPM, the Kärcher K1700 at 1700 PSI and 1.2 GPM, and the WADADDY cordless washer at 1100 PSI. A higher PSI with a low GPM still rinses slowly, and a high GPM with a low PSI still lacks bite, so read the pair on every washer you compare.

Hose, Nozzles and Tank

Reach comes from the hose and the cord. The Chemical Guys washer carries a 25 ft flex hose and a 35 ft GFCI cord, with 360-degree casters and onboard cable storage. The Kärcher K1700 has a 0.5 gal detergent tank and three nozzles in 15 degrees, turbo and 65 degrees, plus an on/off foot switch and never-flat wheels. The WADADDY washer uses a 6-in-1 nozzle with 10-level pressure adjustment and a battery display, and its self-priming system draws water from a bucket, container or tap.

Pressure Washers for Cars, Patios and Driveways

Each washer below handles one part of the choice: the battery washer covers quick cleanups away from power, the K1700 covers cars and patios with a tank, and the PM2000 PRO covers the full wash with foam cannon fittings.

FAQ: garage tools

What PSI do I need for a car?

The washers here cover cars at 1100, 1700 and 2030 PSI, and the K1700 and the PM2000 PRO list cars among their uses. Start with the widest nozzle and keep the spray moving.

Corded or cordless: which should I pick?

Pick cordless when you clean away from power or water: the WADADDY washer is battery powered and draws water from a bucket, container or tap. Pick corded power when you wash a full car or driveway in one go: the PM2000 PRO carries a 35 ft GFCI cord, and the K1700 has never-flat wheels for moving around the property and an on/off foot switch.

Do I need a detergent tank?

Not for every wash. The K1700 carries a 0.5 gal detergent tank for soapy washes, and the PM2000 PRO takes a foam cannon through its universal standard connections. The WADADDY washer suits plain water rinses with its 6-in-1 nozzle.

What does CETA certified mean?

The K1700 is CETA certified, which the maker states as proof of its 1700 PSI and 1.2 GPM figures. No other washer here lists a certification.

Can I wash a car with a cordless washer?

Yes, for quick cleanups. The WADADDY washer runs on a battery, shows the battery level on a display, and draws water from a bucket, container or tap, so it suits cars, windows, patios and hard-to-reach corners away from power and running water.

Related: the best electric pressure washer picks, the best foam cannon picks, how to use an electric pressure washer, the pressure washer nozzle size chart and the car detailing hub.