by htg engineer »
Mon Jan 03, 2011 7:50 pm
Fitting a tundish would be a better solution, as if it did back up it wouldn't get as far as the boiler.
External condensate pipework should take the shortest route possible and the pipe diameter should be no less than 32mm.
If you install to a gutter make sure it's not sitting in the gutter the same with a gully as when snow builds up it prevents the flow of condensate. Condensate pipework discharging into a gully ? the pipe should go beyond the grate.
Lagging the pipework wont really help if the pipes have the correct fall, as flowing water shouldn't freeze, it's when there's no fall and water is lying in the pipe or the outlet of the pipe becomes blocked and the water backs up - that's when it freezes.
Freezing condensate ? - most are down to poor installation/workmanship. Have heard of a few where soil stacks (110mm pipes) have frozen, and installed as per regulation/manufacturers instructions, all blamed on the cold weather, bizarre that water will freeze in a 110mm pipe ?? - but the pipe had to be blocked to start with for the water to freeze.
htg