Air Admission Valve

[Doug99]

Hi All, My upstairs family bathroom and ensuite bathroom wastes are joined together to a single vertical vent stack. As I am refurbishing the ensuite, I was hoping to use an AAV to do away the vertical stack. But as it is only a single stack, I've been told that I wont be able to use an AAV. Is that correct?
Cheers

 

[footprints]

Can't see why, my en-suite has WC, bath and basin into the stack as well as the downstairs WC with only an AAV it all works just fine.

 

[Nakajo]

@footprints To where does it vent ?

 

[footprints]

Just outside the wall where the old stack pipe used to go up to the roof.

 

[Nakajo]

So that's in addition to the air admittance valve?

 

[footprints]

Maybe we are talking at cross purposes I am referring to a 4" AAV to replace the normal stench pipe like this. https://www.wolseley.co.uk/product/mcalpine-internal-external-air-admittance-valve/

 

[footprints]

No I did not create that monstrosity it was there when I bought the house! Never get any smells from the valve entering the window in case you wonder.

 

[Nakajo]

That's why it's there, so you don't get smells at the window. And that's why it's called an air admittance valve. I just worry about all that smelly gas building up in your system with (apparently) nowhere to go

 

[footprints]

That's why it's there, so you don't get smells at the window. And that's why it's called an air admittance valve. I just worry about all that smelly gas building up in your system with (apparently) nowhere to go

No build up of gas, fresh air is pulled in as the waste products go down the drain