Soil Pipe Vent Question

[David Usher]

Hi all,

In my new build I have 4 soil pipes that pop up at various walls on the ground floor. All pipes connect into a single pipe for the sewer.
One pipe will connect to a toilet on the first floor and also connect to the shower and sink waste. Another will connect for kitchen water waste and the others for future provisions.

For building regulations I understand that I need a vent.
My question: Do I need to vent in only one place - i.e. near the toilet or do I need to vent all pipes?

For the vent, how high does it need to vent?


Thanks,
Dave

 

[ShaunCorbs]

i would vent one to outside and then shove the rest on durgos

 

[Darren Jackson]

i would vent one to outside and then shove the rest on durgos

The one outside venting to atmosphere has to be a minimum of 900mm above any opening to the building ie window, dormer or vent etc.

 

[ShaunCorbs]

The one outside venting to atmosphere has to be a minimum of 900mm above any opening to the building ie window, dormer or vent etc.

Isn't that with a Durgo on thought it was 1.2m for natural ?

 

[David Usher]

OK, so I'll vent the one connected to the toilet (which is at a high point).

Regarding the Durgos, I understand they have to be placed on a vertical connection. Do they have to be a certain height and presumably these are OK to add on the first and ground floor?

Dave

 

[Last Plumber]

Isn't that with a Durgo on thought it was 1.2m for natural ?

The original distance was three foot above any opening into a building. I still use that and I wish the rest of the world would stick to what's in my head lol.

 

[Darren Jackson]

The original distance was three foot above any opening into a building. I still use that and I wish the rest of the world would stick to what's in my head lol.

Minimum 3ft (900mm) in my head too. I still stick to that as well. Makes me cringe how many times I see a low level hopper T'd into a stack or a gutter downpipe put into a stack effectively making the height of the vent void and now venting at gutter level inches away from a bedroom window or venting out of the hopper at the side of a kitchen door etc..

 

[oz-plumber]

To really get technical about the situation, you need to provide a plan of the drain runs, distances and pipe sizes.

There are regulations available about venting of soil pipes available.
As long as you follow the regulations, you shouldn't have a problem

 

[chris watkins]

It is only the head of the run that is required to be vented. Part H1 of the Building Reg's sets out the requirements for domestic drainage systems.
https://assets.publishing.service.g...achment_data/file/442889/BR_PDF_AD_H_2015.pdf
I don't understand this obsession with Drugo's most of the time they are not required (or can be replaced with a vent).
Minimum height above an opening is 900mm.

 

[oz-plumber]

My understanding of AAV's were to be fixture based
eg: You have a basin installed to a stack and you can't get the allowed distance from the vented stack to the fixture location.
So without running a vent from the fixture to atmosphere you could install an AAV.

I would never install an AAV at the top of a stack or on a branch drain that is picking up several fixtures.