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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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slacken compression fitting to bleed air ... BANG!
I thought I'd share by exerience of making a foolish and potentially dangerous mistake. I am replumbing the house at the moment and there are some 'dead end' pipes that lead up to the bathroom but are presently capped off with compression stop-end fittings like this: http://www.screwfix.com/prods/50419/...22mm-Pack-of-5 Anyway, these pipes were pressurised at mains pressure but had a lot of air in them. I thought it would be a good idea to bleed the air out. So I thought: "I'll just slacken the stop end compression nut a tiny bit and let the air hiss out, then tighten it up again." Well, as soon as I slackened the nut a little there was a loud BANG and the whole fitting shot off at high speed. Luckily it did no damage. This was followed by a lot of water! I now realise of course that once the fitting was slackened it did not take much force to slide the olive off the end of the pipe. The loud bang was because of all the compressed air in the pipe -about 1 litre of air at 70 Bar. I felt really foolish. Learn from my mistake! Robert |
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