My critics (Bill & Brent) are, of course, right.
Water, being incompressible, will have little stored “blast” energy, and at <1,000psi there’s little danger
of an explosive, shrapnel producing, rupture.
I was (over) reacting to my incorrect
perception of a cavalier attitude towards pressure vessels.
While an 800psi water jet, in the eye or on the alternator
, would be calamitous, it shouldn’t cause serious damage to most soft tissue (ie: wouldn’t penetrate/cut skin).
Most “small” domestic pressure washers (< 1,500 psi) generally deliver between 1.5 and 2 gallons per minute (60 - 120 gph).
A smaller pressure pump, from a 5 gph R/O unit, is likely to deliver only about 50 gph, placing it in the very smallest category of washers. Useful; but not very.