In article ,
"Bob Eager" writes:
On Sat, 6 Jan 2007 00:51:19 UTC, wrote:
Modern? the internal soil stack was only in use (apart from high rise where
there would also be fire issues) in the 1970s and 1980s.

My parents' house was built in 1967, and the whole estate has them. I
believe some regulation came in around then.

Legislation came in resulting from the cold winter of 1962
when lots of external cast iron soil stacks froze and shattered.
It was repealled after plastic soil stacks became commonplace,
but many architects still put them inside the building as they
are not considered very pretty on the outside.

--
Andrew Gabriel