Where have all the stench pipes gone ?

[Pocster]

16 minutes ago, joth said:

Ultimately you can do whatever your building inspector will sign off... However we have already experienced they'll approve one thing on paper then change their mind after you've installed it, so better safe than sorry.

Our plans put AVV in the loft and an external open vent from the drain routed from the end of the main drain, up the outside of the house to the eves next to a drain pipe. My own simplified interpretation is that the regs require all horizontal drains to have a free flow of air through them, but this doesn't necessarily have to be through a stack pipe used internally in the house (or otherwise). 

 

Yeah the regs / interpretation do seem a bit random . Think I’ll go with a loft AAV at the end of a horizontal run ( though AAV mounted vertically of course ) .

Can always add an external stench pipe off the main drain if non interested BCO insists .

Edited February 16, 2020 by pocster