Gas leak bubble tester positioning

James_Calvert said:
Interesting discussion. Anyone know the details of the Lord Trenchard tragic incident? It was this one IIRC which led to current gas installation practice.

As I recall it, the root cause was that in a dual gas installation, a gas tail was incorrectly fitted when replacing a cylinder, which then became the spare. But when the spare was eventually turned on at the cylinder, the gas then leaked out at the union which had been crossthreaded.

So, from what people have said above, if a bubble tester had been installed, it wouldn't have detected the problem.

That was news to me.
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Read the report at https://assets.publishing.service.gov.uk/media/547c717be5274a429000013b/lord_trenchard.pdf
 
pvb said:
Presumably your cockpit drains are open to the atmosphere.
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The cockpit drains are above the waterline and the lowest part of the companionway is above the top of the gas locker so I'm thinking/hoping this is ok?! I've always thought this is acceptable. I do shut the gas off at the cooker and bottle every time Its used out of habbit.

I'm tempted with a cockpit tent myself so maybe it'll be better to seal the existing drain and fit one overboard, another one for the list...
 
Yellow Ballad said:
The cockpit drains are above the waterline and the lowest part of the companionway is above the top of the gas locker so I'm thinking/hoping this is ok?! I've always thought this is acceptable. I do shut the gas off at the cooker and bottle every time Its used out of habbit.

I'm tempted with a cockpit tent myself so maybe it'll be better to seal the existing drain and fit one overboard, another one for the list...
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Yes the gas bottle locker drain should drain to overboard AND the pipe should be sloping down (not level or up) I used 20mm/3/4" dia pipe and never had any issues and yes always switched off gas supply at the regulator every night.
 
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