Advice on air admittance valve. Toilet

[Roy_66]

Small sink in this room however it has its own pipe to the outside.

There are lots of subtleties to getting wastes right, so I'd recommend getting a good professional in to sort it (The professionals on here have given lots of good advice). Just for interest (if you are interested) try the following video. Note it is USA plumbing standards not UK, but it gives you an idea of some of the issues you can have. Many amateurs think wrongly for wastes that it's just a matter of connecting stuff together. You obviously understand the need for vents of some kind.


A UK plumbing standard version of such video would be interesting.

Cheers,

Roy

 

[2021bela]

There are lots of subtleties to getting wastes right, so I'd recommend getting a good professional in to sort it (The professionals on here have given lots of good advice). Just for interest (if you are interested) try the following video. Note it is USA plumbing standards not UK, but it gives you an idea of some of the issues you can have. Many amateurs think wrongly for wastes that it's just a matter of connecting stuff together. You obviously understand the need for vents of some kind.


A UK plumbing standard version of such video would be interesting.

Cheers,

Roy

Mines goes to the outside and has an elbow emptying into a gully but not connected to the gully. It is open vented.

 

[Roy_66]

Mines goes to the outside and has an elbow emptying into a gully but not connected to the gully. It is open vented.

Sounds like you want to leave the sink alone then, so the AAV for the WC will have to go at the side of the loo. Perhaps there is some cunning piece of ornamental furniture you could disguise it with? (Get it all working first)