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If you've had the pipes changed recently it could be there's a 'deadleg' there somewhere. It's a length of pipe that's been capped off so the water has nowhere to go. I'm not sure what causes it exactly but perhaps if some air is left in there it can compress when the water is shut off and the...

ChrisR said earlier he has the calculation for that, so perhaps someone could write a simple Excel spreadsheet with it? G

As gas has to be done only by competent people, I assumed that's who you were referring too. Even if an apprentice had done a poor job, I would have expected the poor flow to be found on commissioning. I can't see anything about using compression fittings over soldered ones in my gas or CORGI...

But it was suggested in this thread by someone who is competent/CORGI qualified.... The joins I have made that were cut open for inspection during courses have been fine and there were no problems with my previous gas work or current refrigerant work, but this was suggested by someone in...

Hi, Many thanks for all the replies etc - there has certainly been some interesting stuff in this thread! For what it's worth, I was CITB gas trained in 1990 and my gas notes from then contained CORGI stuff (I just checked - CORGI 1984). I had to be trained up since I had to maintain and...

Hi. I need to get a gas pipe run from the kitchen to the joined garage for a new boiler install. The gas rate is 3.5m2/h, and looking at the calculations here it seems like 22mm should be fine: http://www.cda.org.uk/megab2/build/pub124/sec3.htm Including bends the length of run is...