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I am adding a basement bathroom in a 1926 house. The mainline is cast iron. I plan on cutting the ci below grade and adding a backwater valve. The house is two story with a basement. I currently have a 1.5" vent from the old laundry tray in the area. My question: Can I use the 1.5" vent to vent the toilet, washer stand pipe and a lav? What about an AAV? I am trying to avoid running a 2"vent up through two floors.
Have you checked to see if your city inspector will approve a AAV, many will not allow them. A vent stack works best if it reaches above the roof line but they can terminate outside along the exterior wall as long as they are a required distance from doors, window, vents, etc...
2" would be better but try going 1 1/2" with a AAV. If yousee the toilet bowl water bouncing or hear any gurgles when the washer discharges increase to 2". Good luck, tomQuote:
Originally Posted by Huckey
You will need at least one 2" vent. If you go with AAV, install at least 2 of them and split the load.
Milo, Where would you put vent #2 and why? Regards, Tom
Thanks for asking Tom...
I would run one 2" from toilet, second 2" from rest of the bathroom including washer. Since 2" vent caries 16 plumbing units, I would combine them in the ceiling and run single 2" to the roof.
But I am (already) aware of Code ( and general installation... ) differences between the Coasts. We want to believe that we do things "right" here... :D
And the rest of us think that you "overdo" things in your area. No wet vents, no high loops,etc. Some of your code restrictions have a tendency to hinder the homeowner more then to help him. Just my opinion but I have lots of company with it. Regards, TomQuote:
We want to believe that we do things "right" here...
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