Quote:
Originally Posted by GGG
I think it has to be that all of the water pipes leak so if you don’t maintain positive pressure on the system contaminated ground wanted would ingress into the system but this is pure speculation. I have the same thoughts around the sentiment concept.
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I was just going to post this. Calgary’s water system apparently leaks like a sieve (I heard 20-25+% loss), so they need a lot of positive pressure to keep contaminants out.