Crazy Ventilation idea...Please don't flame me

[Jimboss83]

Good idea thinking outside the box but Not legal mate no matter how many references you pull out. An AAV only complies if you have one vent on the main line line open to atmosphere.

Us plumbers put one under sinks etc if they are over length (more than 6m to a gulley, over 10m if direct to drain in 65/100mm sewer. .)

Just use a carbon filter!

[Ozzy420]

The sec u cut into the pipe it becomes a health safety issue, not only noxious fumes also fumes that can go bang along with all the other nasty shit that live in a sewer, it may be a good idea in theory but in practice it a lot diff...