Thanks for all the feedback!
To address a few of the points:
Not sure that 3.2bar was the static pressure - that was the reading at the same time as doing the 12l/min measurement on the kitchen tap. I don't think the tap was limiting the flow though because when another tap in the house was...
Seen some good advice on similar topics on this forum so hoping for some advice. New to this so please excuse misused terminology!
Having a new CH and HW system in my house (typical 3-bed semi, one bath, one shower, considering a future loft conversion with additional shower).
Trying to...