On Nov 27, 12:49*pm, "ARWadsworth"
wrote:
AIUI using 32mm pipe is the proper way to go where there is

a danger of freezing.

I'll second that.

This place is selling trace wire (5 watts/metre) that you cable tie to
the condensate line to prevent freezing. http://www.theclevercablecompany.co.uk/
The site says the stat only kicks in below 4c. I've not tried it so
can't vouch for its success, but you shouldn't need a lot of heat in
the pipe to stop it freezing if its lagged too.

Dave.