Air Admittance Valve?

[grommett]

Hi

I am moving a ground floor toilet away from an outside wall by about 3 meters (towards the middle of the house). In other words, extending the soil pipe by about 3 - 3.5 meters. The existing drain is downstream of the stack pipe. Will I need an AAV? If so can it go inside a back-to-wall toilet cabinet?

Thanks to everyone for he useful advice.

 

[larrytheleak]

grommett
that is the correct way to install for the layout as you mentioned
a a valve not always necessary but easier to fit now rather than later

 

[grommett]

One more question... can the AAV go on the drain side of the toilet or must it be at the top end of the run?

Thanks

 

[larrytheleak]

grommet
any configuration will do ideally the a a valve should be higher than the spill over level of the pan