In the past it was normal to turn the gas off at the bottle when it was finished with. This changed with the advent of cut off taps sited at the cooker.
It has become common practice to turn the gas off only at the cooker. Whilst this is a good idea, it provides no protection if the system develops a leak between the cooker and the cylinder.
This was the cause of the explosion on the Lord Trenchard in Poole harbour.
It is vital that the gas is turned off at the bottle when not in use, if you wish to avoid having to go outside to turn it on the best option is to fit an electric solenoid type gas cut off, this can be operated with a switch from below!
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