On 4 Feb 2020 18:40:49 GMT, Tim+ wrote:

AIUI isolation valves should be fitted to all points of use, but I

could be wrong.

In large buildings or anywhere where temporarily shutting off all the H
& C could be a problem, then I think it s a good idea.

In most domestic situations though it s not that hard/inconvenient to
shut off all supplies for repairs.

Domestically every point of use is a bit OTT, every room is better.
Allows the rest of the house to function normally (downstairs loo,
coffee...) whilst you battle the snags that are turning a hours job
into taking the whole day and the day after...

--
Cheers
Dave.