r3vhead
I don’t know what State or Country you reside in, but here is NSW Australia, ALL drains require a vent especially the one i described in my original post which was house drainage.
I know the difference between soil, waste etc stacks, but there was know need to elaborate due to the fact that pretty much all stacks, whether it picks up 50 storeys, a two storey cottage or just a hand basin, it must vent to atmosphere to assist in the drainage and well as prevent any siphonage.
The stack that i mentioned was a soil stack on a 2 storey cottage.
All in all, the question that i asked was not answered.
