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Discuss Soil Pipe Vent Question in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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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
 
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 ?
 
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
 
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..
 
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
 
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.
 
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