That's not how I read it Jeff.
He said it was no use for domestic, and the equation he used for cleaning was a jetting one where his logic was a higher pressure/flow produced a cleaner faster job.
For instance if my tank takes all night to fill up, so what? What difference to the actual window if I had filled up at a hydrant in minutes?
If you follow his logic you could blast with tap water then rinse with pure.
Also you would leave a lot of water whereever you went.
On the other side, though, I also find your meagre usage impossible, so what do I know.