Wally Pfautz
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Is there a requirement (UPC) that the the 4" main sewer line in our house needs a main vent to the roof?
I've seen in some plumbing diagrams what looks to be a large diameter (in this case probably 3") vent coming directly off the main sewer trunk and exiting thru the roof undiminished in size.
In my current design, all fixtures will have their own properly sized vents, and I satisfy the rule that combined thru roof vent area is greater than sewer area, but there is no main "soil stack". No individual vent is larger than 2". So I don't have a vent directly off the main sewer trunk. Is this wrong?
Thanks!
Hazel
I've seen in some plumbing diagrams what looks to be a large diameter (in this case probably 3") vent coming directly off the main sewer trunk and exiting thru the roof undiminished in size.
In my current design, all fixtures will have their own properly sized vents, and I satisfy the rule that combined thru roof vent area is greater than sewer area, but there is no main "soil stack". No individual vent is larger than 2". So I don't have a vent directly off the main sewer trunk. Is this wrong?
Thanks!
Hazel