Screwfix do a shower mixer that looks like an unfeasibly high flow rate compared to most other bar mixers, their ref: 31693 - apparently does 8L/min at 0.1bar - does this sound "right" to those who've fitted them ?
While i'm at it, how the hell do you figure out what your pressure is?
We're on a combi-boiler (WB28SIii), have good cold water pressure, and at the moment, c/o the kitchen sink, it chucks out 9 litres of hot water per minute - although I believe from a previous thread you can't equate throughput with pressure.
I've tried to play safe when ordering taps for the bath / sink by going for 0.2bar jobbies, but I don't know how low I should be setting my sights at for a shower mixer valve (i.e. would a 0.5bar be ok ?)
Any advice would be much appreciated :-}
While i'm at it, because of the difference in pressures, would you fit a pressure equalising valve / pressure reducing valve on the cold ?
Last but not least, and this might sound really dumb :-} but as a shower fed by a combi won't get any hot water for several seconds, how does the temperature setting work - does it let the hot flow until it gets to temp, then let cold through ?