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A comment on Health Concerns Mount as More Old Sewer Pipes Are Lined with Plastic. Parent comment

Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by flaviu2 on Tuesday November 26, 2019 @11:25AM (#21639697)
I'm familiar with vents, but indoor vents are basically one-way air valves. I don't know if this is required by code, but it's definitely common practice (you don't want poop smell coming out of your vents)
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Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by Scoundreller on Tuesday November 26, 2019 @11:28AM (#21639738)
Vent stacks need to be above that roof’s line, but your building might be next door and taller with open windows downwind.

Or a crack in the stack.

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