I'll be having a new 22mm gas pipe installed soon, between meter and boiler. Unfortunately due to the awkward geography (meter in cupboard under stairs; solid ground floor, the pipe will have to travel up the underside of the staircase. Currently the plasterboard has been ripped down from that area - which is in effect a sloped ceiling - as there will be electric cables going up there as well.
Now, once the rewiring is complete I will be putting up new plasterboard there, maintaining the requisite 50mm space between the surface and the cables. Question is, can I hide the gas pipe under there too? I know it can't be boxed in forming a sealed compartmemt - no problem, the bottom end of the plasterboarded boxing will open directly into the meter cupboard, so this would be no different to running it under the folorboards - but is it OK otherwise? Is there a minimum depth for the pipe or anything, or should it be otherwise protected from nail damage etc?
Thanks David