I bought an elec PW at Home Despot a couple years back. Some Italian company. Is occasionally temperamental and then seem to heal itself. I don't get it. But yeah, always have the water hooked up with pressure on. I failed to do that briefly a couple of times and it sounds funny. Luckily it still works pretty well. About $130, 1800 or 1400 psi, there's a choice on pressure. Enough for my work. You have to be careful even at 1800 not to score redwood.

__________________
Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K