Green Building Forum - Inside or outside for a soil-pipe?

Green Building Forum - Inside or outside for a soil-pipe? Wed, 22 May 2013 07:20:23 +0100 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130871#Comment_130871 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130871#Comment_130871 Thu, 19 Jan 2012 10:51:24 +0000 davidfreeborough Posted By: qeiplI can imagine a stack covering two storeys with WCs on both levels would need a vent at the top of the stack.My house will be 2.5 storey, so I'm wondering whether I can get away with your arrangement underground/outside if I put AAVs at the top of each internal stack.

David]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130872#Comment_130872 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130872#Comment_130872 Thu, 19 Jan 2012 10:52:10 +0000 joe90 ]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130875#Comment_130875 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130875#Comment_130875 Thu, 19 Jan 2012 11:03:55 +0000 borpin Posted By: joe90I have also had a BCO not allow a toilet and basin connected to a boss without an AAV (there was an external vented stack from the ground level drains )and that AAV had to be above the height of the overflow on the basin. Just another example of different BCO's with different views.

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" > It really depends on the length of the un-vented tee from the vented main run. I think if it is any more than a meter or so, they will look for an AAV at the end of the Tee.]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130879#Comment_130879 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130879#Comment_130879 Thu, 19 Jan 2012 11:37:25 +0000 joe90 Posted By: davidfreeborough

Posted By: qeiplI can imagine a stack covering two storeys with WCs on both levels would need a vent at the top of the stack.

My house will be 2.5 storey, so I'm wondering whether I can get away with your arrangement underground/outside if I put AAVs at the top of each internal stack.

David

I dont see why not, maybe worth checking with your BCO before you fit it as you will see above there are different opinions even among BCO's]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130880#Comment_130880 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=130880#Comment_130880 Thu, 19 Jan 2012 11:52:31 +0000 pmagowan
Would boxing them in not reduce the heatloss from the exit through the wall and also help prevent them freezing in the cold? I also thought it could reduce the wind-load on them and the risk of a plant growing behind them and putting pressure on the fixings.
Paddy]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131193#Comment_131193 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131193#Comment_131193 Fri, 20 Jan 2012 23:37:34 +0000 mrsherbie http://www.keymer.co.uk/products/Ventilation%20Range/

I didnt want any junk on my lovely clay roof either. I would post a photo but there is nothing to see, it is successfully invisible
:bigsmile:

]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131414#Comment_131414 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131414#Comment_131414 Sun, 22 Jan 2012 14:33:59 +0000 TimSmall Posted By: davidfreeboroughCould the AAVs be fitted under one of the sinks to allow easier access? What's an anti vac trap?
David

Have you looked at any of the P-trap replacements like "HepvO"? I believe you can dispense with the addition soil pipe AAV if you use one of these on the nearby basin (or if you don't have a nearby basin, or any other similar P traps for the suctioning to occur from, then you don't need an AAV at all, I think).

Looking at the design of those HepvOs, I don't think I'd feel happy with using them on a shower or bath tho - too much scope of hair etc. keeping them wedged open a crack I think, but if it's accessible like a P trap under a sink normally is, then they look OK to me.

I'm a bit new to drains, so I'm not 100% on this by any means...

Tim.]]> Inside or outside for a soil-pipe? http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131424#Comment_131424 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8420&Focus=131424#Comment_131424 Sun, 22 Jan 2012 15:33:26 +0000 CWatters Posted By: joe90I have also had a BCO not allow a toilet and basin connected to a boss without an AAV

The regs allow another method. See Part H, Para 1.22 "Branch ventilation pipes" and diagram 4.

In addition to the main branch pipe you run a smaller vent pipe from the stack (above where the main branch connects) to the far end end of the branch.

http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADH_2004_NEW.pdf]]>