Stench pipe cant be found!!!

[Dodger59]

Hi there. My house has a bathroom in the middle, put there by previous occupant, so is not on an external wall. I presume the toilet waste goes under the house, straight into the main sewar.
My question is, i cannot find the stench pipe going up the outside of the building. Would i need one in the instance?
Thanks for any help. Roger.

 

[gigz]

If you can't see it on the outside go into the loft to see if it's in there, might have a AAV ON IT.

 

[doitall]

Its an AAAV Gigz

Auto Air Admittance Valve

 

[denso13]

Anything sticking through the roof that resembles a soil pipe?

 

[Nige F]

Its an AAAV Gigz

Auto Air Admittance Valve

Durgo to you

 

[gigz]

Its an AAAV Gigz

Auto Air Admittance Valve

Ahhh but when they're broken they're just air admittance valves

 

[doitall]

When they broken I thought they let the air out, smells like it anyways.

 

[mfarrow]

My house has a bathroom in the middle

Which floor? If the ground floor and vents are elsewhere then you might not need one.