32mm Waste Length - Siphoning Issues?

[doitall]

I am making the assumption these AAV's can only be mounted horizontally!

On the contrary, AAVs must be mounted vertically. Check this.

Well as your your footer says!
My not very logical brain assumed it would have to be horizontal. Why does this link them show it horizontally mounted?
http://news.hunterplastics.co.uk/viewitem?newsno=58050&Archive

??

Rob

But its vertical in your link as well barney

 

[Softus]

The shower waste is 40mm and enters the stack on its own boss but I'm guessing perhaps flushing the loo or emptying the sink was enough to pull it.

That seems very unlikely, if the shower doesn't share a run with anything. However, do you have a vent on the stack that it enters?

 

[barney12]

I am making the assumption these AAV's can only be mounted horizontally!

On the contrary, AAVs must be mounted vertically. Check this.

Well as your your footer says!
My not very logical brain assumed it would have to be horizontal. Why does this link them show it horizontally mounted?
http://news.hunterplastics.co.uk/viewitem?newsno=58050&Archive

??

Rob

But its vertical in your link as well barney

Oh my simple brain. My excuse is that it was a Bank Holiday
The valve is of course verticle. But, the fitting its self is horizontal in the pipe.

............I'll get me coat

Rob

 

[barney12]

The shower waste is 40mm and enters the stack on its own boss but I'm guessing perhaps flushing the loo or emptying the sink was enough to pull it.

That seems very unlikely, if the shower doesn't share a run with anything. However, do you have a vent on the stack that it enters?

Yes the stack has an AAV which is within the same room.

Rob

 

[Softus]

The shower waste is 40mm and enters the stack on its own boss but I'm guessing perhaps flushing the loo or emptying the sink was enough to pull it.

That seems very unlikely, if the shower doesn't share a run with anything. However, do you have a vent on the stack that it enters?

Yes the stack has an AAV which is within the same room.

In that case I can't see how anything would pull the water seal out of the shower trap. Is it possible that it's drying out?

 

[barney12]

In that case I can't see how anything would pull the water seal out of the shower trap. Is it possible that it's drying out?

Yes, I think you are probably right. Its the guest bathroom and the shower doesn't get used much. I happened to get chatting to a plumber in the merchants today and he said the same thing and said it would be a good idea to fit a HepVO in line to prevent the smells if the trap dries out.

Rob