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ppm

  1. Neilmnwc

    Water ppm I Can Only Dream of...

    Just got back from a week in the Lake District and had some water left in the bottle so decided to check the ppm, 47ppm straight out the tap! Back to using my 368 out the tap... Hey ho. As far as Window cleaning goes I couldn't imagine there would be much WFP work due to the amount of holiday...
  2. C Rose Cleaning Services

    Highest PPM you use

    Having one of those days today; ladder blew over and left me stranded on a roof and last couple of jobs have left spots behind and have needed redoing which got me thinking about PPM. I've read anything up to 010 is fine for window cleaning and Unger recommend I change my resin once it reaches...
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