"Matt Beard" wrote in message
oups.com...

Part 12163 fails to meet my stated
requirements on two counts. a) it is
not cheap (£48) and b) it is 22mm when I stated I wanted 15mm.

There is a 15mm version. 12162 at £38. Good vales are not a few quid.
Best get a 22mm and blend down all the house supply. If 15mm is coming
from the cylinder draw-off replace it with 22mm as it should be.


Also it may soon be mandatory to fit blending valves on all new systems
in England and Wales, but I don't live in either of those countries so
I doubt that it applies to me!