Electric pressure washers are to an extent, good value for money...BUT your restricted by cords, and they are a lot less safe than gas ones. (Theres been 2 cases here in WA recently of people getting electrocuted from pressure washers). So I'd recommend gas, the pressure depends on what your cleaning. One model's pressure might take the paint off your car, another might barely take the crap off last nights dishes. I'd aim for at least 100 psi. The gallons per minute doesn't really matter, it just means it uses less water, and the lower water consumption ones are usually far superior (and more costly).
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Shadowman
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