The Difference Between Electric and Gas-Powered Pressure Washers

If you are in the market for a new pressure washer, you should know that there are two basic classifications:  electric and gas.  Of course, each of these two also has many sub-classifications, but first let us take a second to look at the basic difference between Unimanix electric pressure washers and gas pressure washers.


Pressure is measured in something called “psi” or “pounds per square inch” and when it comes to electrical pressure washers, there is an upper limit of 2,000 PSI.  This is actually quite small, but it makes sense when you consider that pressure water motors are typically only about 15 amps.  As such, the typical output varies between 1500 and 1800 psi.

In terms of electric motors, you should know that some have induction motors. These are water-cooled because they circulate the fluid around the engine before releasing it through the associated hose.  Some also have axial cam design pumps with more expensive—and durable—models equipped with triplex plunger pumps.

Gas powered pressure washers can have much higher psi ratings, of course.  Most of the time you can expect a gas powered pressure washer to produce an average pressure of around 2800 psi. Still, you can even find models with ratings of up to 4,000 psi and higher.  In fact, some of the biggest professional high-end models can even reach ratings of 7,000 psi.


As you might expect, gas-powered pressure washers are also stronger in this regard, than electric models.  In this case we are comparing electric washer water flow ratings at a maximum of 1.5 GPM against gas-powered pressure washers, which can deliver upwards of 2.5 GPM, sometimes more.  Of course, gas-powered pressure washers tend to have stronger engines and use more heavy-duty pumps and brass parts (electric pressure washers have parts made of plastic and steel-threaded hoses).


Basically, electric-powered pressure washers are best for indoor use for a few reasons.  First of all, they are smaller and easier to use, which makes them better suited for smaller spaces.  Of course, they are not as portable as you would like, since you have to keep then plugged in. On the other hand, gas-powered pressure washers produce harmful fumes that require exhaust.  Gas-powered pressure washers have manual starters, though they are stronger, which makes them better suited for outdoor and industrial uses.

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