Having trawlled through old DIY posts I can't seem to get a definitive answer on whether it is acceptable or not.
Basically gas meter outside in plastic box, pipe enters inside under kitchen sink, goes left about 50cm then goes directly upstairs against the wall next to the hot and cold pipes. Can I box all three together. If so can I use plaster board and skim, or is it better to use mdf and screw and paint, incase access is needed in the future.
TIA
Jon
"jon" wrote
Have just had boiler replaced and have boxed in the supply pipe in the corner of an adjacent room. One guy that quoted stated that it was OK to box it in provided a vent was left in the box. As my box work is full height upto first floor void he said there was a chance that the gas could fill the boxing and the upstairs floor void before detected. The pipe was originally boxed in in the same location. I have not included a vent as there is a sleeve around the gas pipe which will carry gas through from the boxing into the kitchen.
It sounds like your box work will be open below work top level so gas should escape immediately and be detected.
I am not an authority, just applying common sense - wait for more educated response if doubtful
HTH
Phil
I think the general idea is not to allow a gas leak to build up in any unventilated space of any great size, so either don't box in or vent the boxing. Having said that it appears perfectly OK to run gas pipe under the floorboards on the first floor, which defeats the logic of the original argument!
Andy.
The rules for gas pipes in ducts is given in the BS 6891 which is the standard (linked below).
To summarise: If the ducts is below 100cm^2 Xsection AND 0.1^m volume then you do not need to ventilate the void.
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