I've had about 5-6 of them over the years and the best ones were commercial heated units. The hot water (200 degrees) and a soap injector were more important than pressure. And they were 220V electric powered with CAT pumps. The type of pump is VERY important if you intend for it to last. Companies like N-H and the like advertise the hell out of HP and pressure, even engine brands. These are nothing more than come-ons for the uninitiated first time buyers. Not nearly as important as gpm and type of pump. Even 1500 psi is fine if the flow (gpm) is there and it makes hot water.
That is what I've learned over the last 35 years of owning these things so use an old man's experience and consider this before you buy. Buy it correctly the first time and keep it for a l-o-n-g time.
