On 25/05/2021 12:52, Steve Walker wrote:

Possibly, although it's easy enough to identify in many houses - with
gas coming straight through the wall to the meter and then from there
usually only going to the living-room fire, the cooker in the kitchen
and the boiler (often in the kitchen), with the latter two often a
single run. No gas upstairs

With many boilers now being installed in airing cupboards and attics
that is changing rapidly.



and, in a house with suspended floors, the
route of each pipe downstairs can be clearly seen.


--
Chris B (News)