There is a difference between the phrase
"Working for 50 years."
and
"In use for 50 years."
The way this is plumbed will siphon water from the traps.
Yes, the water will move it's way down the line, so will the water in the p-traps.
The home may smell a bit, but then after 50 years, you start thinking that's normal.[/QUOTE]
Good point. Well, apparently way back then wet venting was all the rage in Canada.
Anyway, all of the that plumbing is in the slab.
Is there anyway of adjusting the above slab plumbing to improve the venting issues?
Would the following changes be sufficient?