Toilet Waste Soil Pipe Connection

Softus

However, capping off the top part is a no-no - it should be connected to a vertical run and carried up to a roof vent, unless the BCO says that you can reduce the height and use an AAV.

Do I need to do this as I aready have a vent running up to the roof from the main stack?
 
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Softus

However, capping off the top part is a no-no - it should be connected to a vertical run and carried up to a roof vent, unless the BCO says that you can reduce the height and use an AAV.

Do I need to do this as I aready have a vent running up to the roof from the main stack?
Maybe; maybe not. I can't answer that without knowing the layout and lengths of runs of your existing soil system.

Even if I did answer it, the work you're planning is notifiable, and the final decision about the vent/AAV rests with your BCO.
 

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