robert wrote:
On 27/11/2010 12:03, The Medway Handyman wrote:
Thomas wrote:
Hi

Awoke this morning to no heating due to frozen condensate pipe on
new boiler :-(
Boiler is in integral garage with no convenient internal drain, so
condensate pipe runs the length of the garage and exits through wall
with about 2" protruding over drain-pipe drain. Managed to pull
about 18" slug of ice out with help of hair drier and all was well.

So, what is the best way to prevent this in future? Pipe is about
20mm but I dont really want to install a larger bore due to the need
for a larger hole through the wall. I'm in two minds about
insulation - there's very little to lag on the outside, but will
lagging on the inside help or hinder? The garage is pretty well
insulated and never anywhere near freezing. I was wondering about
inserting a length of copper tubing or a metal rod up the pipe with
the idea that this would take some of the heat from the garage into
the final section of the pipe where the freezing is starting?



AIUI using 32mm pipe is the proper way to go where there is
a danger of freezing.

I'll second that.

--
Adam