Where do you stick an AAV?

[djboyd]

Hi

I am fitting a vanity unit in a new build bathroom. Since the air admittance valve must be above the flood level, does that mean it cannot go within the vanity unit since the sink is mounted on the shelf? Or is it normal to stagger the level of the shelf so it is higher at the cistern?

Thanks for any tips.

 

[Billy Bob Bob]

if your fitting a aav to the waste system(sure your not talking about soil?) just get a trap with one built in

 

[djboyd]

Errr, perhaps I am talking about soil!

 

[Billy Bob Bob]

if it went in the vanity unit would it not be lower than the toilet outlet?

 

[djboyd]

No, it would be level with the cistern, but above the outlet. The highest outlet would be the sink overflow, I think! I have searched to see where it can go, but there isn't much info about where to site them. If I have to run it up the wall it is going to look ugly.

 

[Billy Bob Bob]

right see what your doing, no reason why this would not work

 

[djboyd]

I was wondering what everyone else does with them - must be a common problem. Thanks for your replies, gas man

 

[REDSAW]

i think its 100mm above the sink hole for 50mm dergo.

 

[Billy Bob Bob]

i think its 100mm above the sink hole for 50mm dergo.

you might be right redsaw have not done a dergo for a while

 

[djboyd]

Sorry to resurrect this one - still considering options! My architect reckons I should site it below the top flood level (ie below level of sink overflow), but above the toilet bowl - on the basis that if anything floods it will come out of the toilet first and not reach the AAV.

Is he right?

 

[fuzzy]

used to fit alot but cannot remeber the height, from memory it was usually about a metre above wc conection, not sure why just was!

 

[shorticus]

Just checked CIPHE design guide on stub stacks, the AAV has got to be above the spill over level of the basin i.e. above the rim not the overflow

 

[mikegas]

This one says you can fit above or below flood level
http://www.mcalpineplumbing.com/pdfs/SEC6copyright - air admittance valves.pdf

 

[shorticus]

This one says you can fit above or below flood level
http://www.mcalpineplumbing.com/pdfs/SEC6copyright - air admittance valves.pdf

Well you certainly learn something new everyday

 

[PuraTherm]

"Where do you stick an AAV". A rather personal question if I do say so my self. What I do with my AAV is my business