Full of crap tbh that article lol
4500L over 3 vans?
spotting if it goes over 7PPM
All tap water is 400PPM
15 - 20 houses a day with 1500L of water per van LOL
A few anomalies perhaps but:
4,500l could be used with 3 vans 500l of pure is 1,500l at a 2:1 waste/pure ratio.
When that was written, he probably believed the 7ppm. Some people used to do all sorts of things ie. soak their brush heads in pure water overnight.
Some people still advocate not cleaning at more than a couple PPM.
His tap water could be 400ppm. Mine is 350ish...
1,500l-see above.
We've probably learned more than we think in the last 5 years or so...