3 minutes ago, transam said:

Yes, hadn't used it for a long time, but I just dismantled an indoor A/C unit, gave the fan a good blast with it, can't fault it...????

wow thanks for the very fast reply, appreciated. Have just posted on here for peoples thoughts. Had bought one from China but the gun part kept on packing up plus was only 110bar, need something more powerful for cleaning the concrete of the black muck. Thank you for your comment.

 

The problem with the cheap units from China (they all come from there, cheap and not cheap) is that the guns are really quite flimsy. I have had 2 guns fail, but the better guns, that are twice the weight, are really good but you will pay over 600 Baht for 1