Hmm not sure about that, surely all that prooves is that the water is pure. Just make sure you know for sure that are doing things correctly. A tattooist in our area was not steralising his equipment properly and one easy got found out he fled the country so can imagen the consiquenses are pretty bad! The police put a not on the shop door all who have had a tottoo done here please get a blood test from your go as soon as possible or something along those lines I had a tattoo there years ago luckily my blood test was fine.
I'm astonished that any tattooist is still failing to use autoclaving. The risks of getting varieties of hepatitis or HIV are very real still. Just because they don't make the news in the way they used to does not mean they have gone away. You don't even need to be abe to see the blood for it to happen.
Selling pure water isn't something I would get into currently as it would be necessary to tie myself up to being at my work base to meet someone. This would usually mean me losing more in income than what I would make from selling it. I suppose if I bottled and branded it though it could make a bit of money eventually.
"Peckham Purified" springs to mind