Types of Pressure Washers: Electric, Gas and Cold Water
Types of pressure washers explained: electric, gas, hot water and cold water machines, how PSI and GPM shape cleaning power, and gas picks for driveways, decks and cars.
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4200PSI 4.0GPM Gas Pressure Washer9.7/10View on Amazon - 2
4200PSI Gas Pressure Washer 4.0GPM Gas Power9.7/10View on Amazon - 3
PowerSmart Gas Pressure Washer9.6/10View on Amazon - 4
Gas Pressure Washer 3400 PSI 2.6 GPM 5 Quick9.5/10View on Amazon
A driveway caked with winter grime, a deck grey with mildew, a car coated in road film: each of these jobs calls for a pressure washer, but not the same kind. Types of pressure washers split into electric and gas machines, and into hot water and cold water machines, and the right choice depends on the surface, the dirt and where the work happens.
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Below: the main types of pressure washers, how PSI and GPM shape cleaning power, and gas machines that handle driveways, decks and cars.
4200PSI 4.0GPM Gas Pressure Washer
A gas pressure washer rated at 4200 PSI and 4.0 GPM with a 7HP 212cc engine, 5 nozzles, a 32 ft hose and a 3L soap tank, ETL listed.
Pros
- 4200 PSI at 4.0 GPM for driveways, decks and siding
- 7HP 212cc engine with recoil start
- 5 nozzles in 0, 15, 25, 40 and 60 degree angles
- 32 ft steel-braided hose and 3L soap tank
Cons
- 66.0 lb body needs its wheels for moving
- Gas engine needs fuel, oil and outdoor use
- No foam cannon in the box
- 4200 PSI is more than car paint needs; use the wide tips
4200PSI Gas Pressure Washer 4.0GPM Gas Power
A gas pressure washer rated at 4200 PSI and 4.0 GPM with a 7HP 212cc engine, 5 nozzles, a 25 ft hose and a 1L soap tank, ETL listed.
Pros
- 4200 PSI at 4.0 GPM for driveways, decks and patios
- 7HP 212cc engine with recoil start
- 5 nozzles in 0, 15, 25, 40 and 60 degree angles
- 25 ft steel-braided hose, kink-resistant
Cons
- 66.0 lb body needs its wheels for moving
- Soap tank holds 1L, so refills come sooner on large jobs
- Gas engine needs fuel, oil and outdoor use
- 4200 PSI is more than car paint needs; use the wide tips
PowerSmart Gas Pressure Washer
A gas pressure washer rated at 3800 PSI and 2.5 GPM with a 212cc OHV engine, AAA axial cam pump, 35 ft hose and onboard soap tank, PWMA certified.
Pros
- 3800 PSI at 2.5 GPM reaches second-story surfaces
- 212cc OHV engine with easy-pull recoil start
- 35 ft abrasion-resistant hose
- PWMA certified and UL 1776 compliant
Cons
- 61.0 lb body needs its 10-inch pneumatic tires for moving
- No warranty term is stated on the listing
- No foam cannon in the box
- 3800 PSI is more than car paint needs; use the wide tips
Gas Pressure Washer 3400 PSI 2.6 GPM 5 Quick
A gas pressure washer rated at 3400 PSI maximum and 2800 PSI working pressure at 2.6 GPM with a 212cc engine, foam cannon and 5 nozzles, with a 1-year limited warranty.
Pros
- 3400 PSI maximum, 2800 PSI rated working pressure
- Foam cannon included for car washing
- 2.6 GPM with 5 nozzles in 0, 15, 25, 40 and 65 degree angles
- Total Stop System shuts the pump off when the trigger is released
Cons
- 3400 PSI maximum is the lowest maximum pressure here
- No onboard soap tank; the foam cannon and detergent hose carry the soap
- 1-year limited warranty, a shorter term than the other machines here
- 212cc engine still needs fuel and outdoor use
Types of Pressure Washers: Electric, Gas, Hot Water and Cold Water
An electric pressure washer plugs into an outlet and suits light washing around the house and the car. A gas pressure washer runs on a gasoline engine, so it works outdoors with no cord to manage, where a water supply and a hose reach, and it suits driveways, decks, siding and large areas where the dirt is ground in.
Hot water and cold water describe the water, not the power source. A hot water machine heats the water and cuts grease and oil stains faster, which suits shop floors and engine bays. A cold water machine uses tap water as it comes and suits general washing and most home jobs.
| Type | How it works | Suits |
|---|---|---|
| Electric, cold water | Plugs into an outlet | Cars, patios, light washing |
| Gas, cold water | Gasoline engine | Driveways, decks, siding, large areas |
| Hot water | Heats the water before the spray | Grease, oil stains, shop floors |
| Cold water | Uses tap water as it comes | General washing, most home jobs |
PSI and GPM: What the Numbers Mean
PSI measures the pressure of the spray, and GPM measures the flow of water. Pressure cuts into stuck dirt, while flow rinses it away, so a machine needs both to clean well.
For car paint, a wide fan tip and a gentle setting are the safer choice. For concrete, a narrower tip and higher pressure do the work. Check the manual for the tip and setting the maker lists for each surface before washing.
Gas Pressure Washers for Driveways, Decks and Cars
Gas machines handle the heavy outdoor work above: driveways, decks, siding and large areas where an outlet is out of reach.
Pressure Washer Safety Basics
Wear eye protection before pulling the trigger, and never point the spray at people, pets or the machine itself. Keep hands and feet clear of the nozzle, and never run a gas engine in a closed garage.
Keep electric pressure washers on a GFCI outlet, never point the wand at people or pets, wear eye protection with polishers and chemicals, and read the label before mixing any cleaning products. Read our Safety Disclaimer.
FAQ: garage tools
What type of pressure washer is best for washing a car?
An electric machine or a gas machine on a wide fan tip suits car paint, with car wash soap for pressure washers laid on before rinsing. A gentle setting lowers the risk to the paint.
Is a gas or electric pressure washer better for a driveway?
Gas suits a driveway, where the dirt is ground in and the area is large. The gas machines above are rated at up to 4200 PSI, which cuts into concrete stains.
What is the difference between hot water and cold water pressure washers?
A hot water machine heats the water and cuts grease and oil stains faster, while a cold water machine uses tap water as it comes. Most home jobs need cold water only.
Can a pressure washer damage car paint?
Yes, when the tip is too narrow or held too close. Use a wide fan tip, keep the spray moving, and start with a gentle setting on a small area before washing the whole car.
Do gas pressure washers need an outlet?
No. A gas pressure washer runs on a gasoline engine and needs no outlet, so it works outdoors where a water supply and a hose reach.
Related: the best gas pressure washer picks, the best electric pressure washer picks, hot water vs cold water pressure washer and gas vs battery pressure washer.
