In article ,
mike ring writes:
I'm experimenting at the moment with dosing my cistern with small metered
amounts of spirits of salt (hydrochloric acid), on each flush

This reminds me of a concern I had about the condensate drain
from a condensing boiler. Mine goes off into a Victorian sewer
pipe which very rarely has anything else going down one length
of it. I did wonder if the constant exposure to the acidity
might harm the cement between the glazed pipe sections. I'm
not sure what type of cement this will be in a 1900 sewer.

This makes me think of another idea -- how about running the
condensate into the toilet cistern if it's the type which
overflows down the pan? That would probably remove any
limescale problem over quite a short time.

--
Andrew Gabriel