"Walter R." wrote in message
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Wonder if 1300 psi will remove the mildew from my pool deck?? Anyone know?

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Sure, but it will take longer than a bigger one. The high pressure ratings
are a bit optimistic, but a higher rated one does have more power than the
lower rated ones.

That 1300 or 3500 psi is over a very small area; think of it as a way to
compare though. As soon as you use the spray nozzle and put some distance
between the outlet and the piece to be sprayed, the pressure is actually
much less.

Is your pool deck wood? Use care so as not to make gouges in it. Get that
pinpoint spray up close and you can do a lot of damage.