In article , Mary
Fisher wrote:
I wish I'd taken a picture of a central heating boiler installation
at a neighbour's house - done on a government grant..

The gas pipe was fixed *outside* the walls.

Not unusual and arguably often safer than the alternatives.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm