The good flow rate capacity matches well with the pressure capacity, providing for a machine that's flexible enough to meet the demands of most any job, Valentine said. Bryon Becktold of Michigan Power Cleaning said contractors should remember that as they increase flow capacity or pressure specifications, they need to remember the need for additional horsepower, and factor in that additional heft and bulk in determining whether additional capacity is a wise choice. In fact, Becktold generally believes that less is more, or at least good enough. I say, No. The force you feel kicking back against your arm is the mass of the water, not the pressure.
Volume is definitely as important as the psi.
Eleven horsepower Honda. They don't care if it puts out 2,400 or 3,000 or 2,200 psi. They want an 11 horsepower Honda. They don't always understand how these things work. Becktold said he thinks 3,000 psi is probably too much for the typical painting contractor, at least residential contractors.