In an earlier contribution to this discussion,
Andrew Gabriel wrote:

. Might want to
keep the length of run to the 110mm soil stack as short as possible,
particulary the outdoor part of it. Condensate is still slightly
warm on mine when it runs into the pipe, so it would probably be
quite difficult to get it to freeze inside the loft area.

I think it's an *internal* soil stack - so there wouldn't be an outdoor
part.

Presumably the condensate isn't hot enough to damage the plastic soil stack?
--
Cheers,
Set Square
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