In order to install a new close-coupled WC I need to shorten the
existing soil-pipe by a few inches. It appears to be cast-iron
(1950s).

My Collins DIY manual suggests hiring a "ratchet chain-link cutter"
for this task. I seem to recall reports, however, that cast-iron can
be sucessfully cut with an angle-grinder.

I have sufficient access all round for my 4.5" grinder. What are the
chances of managing this, or is there a significant danger of breaking
the pipe? Would regular metal-cutting discs do the job?

Thanks for your thoughts.

--
Ben Edgington
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