I have a karcher that works at 3000psi, I tried my best with my paving area but even with this machine I couldn't get a result that I was happy with. Ended up getting a business that deals with cleaning and sealing, came up a treat and much easier now maintaining the finish. If you get someone in get a few quotes some crazy price differences out there.
Oh don't get complacent with these water blasters, saw a nasty incident with a workmate out on a remote workplace where he accidently sprayed his wrist and sustained a fluid injection injury and got a trip back to Perth via the flying doctor.
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