"Dave Plowman (News)" wrote in message
...
In article om,
Dave Liquorice wrote:
I'll ask again - more in hope than anticipation. Where does one buy the
type of mixer tap the OP has for a combined low pressure hot, high
pressure cold, supply?

Just bought a bath filler and basin filler from Boundary Bathrooms. Dual
control, 1/4 turn ceramic disc, monoblock, twin flow, suitable for low
and pressure systems. The key words are "twin flow" rather than "mixer".

Bath units tend not to be so difficult as many are available with 22mm
fittings.

On the OPs problem it may well be related to his fancy tap. It could
well be designed for high pressure systems only and thus will perform
badly on a normal UK HW tank fed (low pressure) HW system.

Snag is he obviously wanted the design he bought - as I did.

You didn't, you didn't know the difference between low and high pressure
taps.