We have recently had an upstairs tooilet removed, to be told that the stench pipe is joined to the toilet downstairs. Although the stenchpipe has been capped we are now experiencing horrible smells upstairs. After speaking to the plumber that did it, he now informs that we need a Dego valve and that the stench pipe needs to be capped at a vertical position and all pipe to be removed from the upstairs vicinity. How far do we have to take it back to? The original pipe is in the cloak cupboard next to the kitchen and we are assuming that both toilets are connected at this point(because original downstairs toilet was also moved into extension on ground floor). If we take it back to the cloakroom and cap it at a vertical point there should it be near the floor (above or below) or will just under the ceiling(below the bedroom upstairs) be OK?

I'm not familiar wit the term "Dego Valve" please explain its function. If he capped off the vent,( stench pipe) then you would leave the downstairs toilet unvented.

" After speaking to the plumber that did it, he now informs that we need a Dego valve and that the stench pipe needs to be capped at a vertical position and all pipe to be removed from the upstairs vacinity"
In 50 years I have never heard of tearing out a vent because a toilet was removed. I can see no benefit in doing that outside of making a simple job more expensive. Why mess with the vent at all when capping off the unused toilet will give you the same results. And where would this "Dego Valve" be installed? What am I missing? Regards, Tom

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Originally Posted by speedball1

I'm not familiar wit the term "Dego Valve" please explain its function. If he capped off the vent,( stench pipe) then you would leave the downstairs toilet unvented.

" After speaking to the plumber that did it, he now informs that we need a Dego valve and that the stench pipe needs to be capped at a vertical position and all pipe to be removed from the upstairs vacinity"
In 50 years I have never heard of of tearing out a vent because a toilet was removed. I can see no benefit in doing that outside of making a simple job more expensive. Why mess with the vent at all when capping off the unused toilet will give you the same results. And where would this "Dego Valve" be installed? What am I missing? Regards, Tom

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Dego valve is a manufacture name for an air admittance valve, which he has fitted on the vent but unfortunately this is not stopping the smell from dispersing all around the upstairs level of our home. Is this because it is jioned to the downstairs toilet as he said.

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Originally Posted by evsie

Dego valve is a manufacture name for an air admittance valve, which he has fitted on the vent but unfortunately this is not stopping the smell from dispersing all around the upstairs level of our home. Is this because it is jioned to the downstairs toilet as he said.

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QUOTE=evsie]Dego valve is a manufacture name for an air admittance valve, which he has fitted on the vent but unfortunately this is not stopping the smell from dispersing all around the upstairs level of our home. Is this because it is jioned to the downstairs toilet as he said.[/QUOTE]

I find it very odd that I can pull up nothing on the internet on a Dego Valve, the manufactures name or any mention of Dego when I Put up Air Admittance Valve on my search engine.(Google). We use Studor Vents, (see image) in my area. I also find it even stranger that a plumber would cut back a working VTR, (vent through roof) to install a AAV. What did he do about the hole in thr roof or was this vent revented back in the attic? If it was and he failed to cap the revent fitting off then that's where the smell's coming from. I just have to be missing something here. Are you in the US or are you in another country? Regards Tom

I am in the uk. The vent never went into the attic and through the roof! The upstairs toilet was added at the same time as the original downstairs toilet was removed, leaving the original stench pipe in what is now a coat cupboard next to the kitchen, then an extension was added on (downstairs bathroom with toilet) and both the upstairs and downstairs toilet were connected to the same vent, however the vent was never taken through the attic and vented out of the roof. We have now removed the vent from the upper level as there is no toilet there anymore and capped it off using the AAV at just above floor level in a vertical position in the coat cupboard. We hope that this will now eleviate the problem? The smell has already subsided upstairs.

'The vent never went into the attic and through the roof.
The vent was never taken through the attic and vented out of the roof."
Are you saying that a plumber left you with a open vent in your walls? This is a direct connection between then sewer and your home. No wonder you smelled sewer gas. Sewer gas is harmful to your families health and the methane content in it makes it explosive.
"We have now removed the vent from the upper level as there is no toilet there anymore and capped it off using the AAV at just above floor level in a vertical position in the coat cupboard. We hope that this will now eleviate the problem? The smell has already subsided upstairs."

Hopefully this will solve your problem Let me know if it don't. Tom