Thought about this, but just going see how it goes, outside taps dont give enough lpm to run JW!I have a 650l tank but it holds pure so I never use it in case I contaminate the tank and it messes with my window cleaning. If I can't get access to outside tap then I don't want the job. I streaked all my windows once with a contaminated brush, never again, nightmare but my customers stuck by me when I did them again for free.
so going have to have a water supply