In message .com, dp
writes
I'm fitting a mira excel shower but I'm confused. The instructions say
a drop tight pressure reducing valve (PRV) to be fit if the supply
exceeds 5bar maintained. I suspect that my pressure is quite high (it
comes out of the cold tap a lot faster than the hot tap) the hot tap is
fed by a worcester 25si which I understand provides hot at 2.5 bar.

The shower instructions also say the shower works best if the two
supply pressures are equal.

Does a PRV allow you to set the output pressure to a certain setting?


I had similar installation. I decided to install in and see how it
went. After installation the shower 'whistled ' sometimes - usually in
the summer. Which is the symptom of to high a pressure.

I put a PRV in the cold feed. It wasn't calibrated in anyway. just set
the adjusting screw to midway, it all worked ok so left it at that.


--
Chris French