Pressure in Shower

[charliesmum]

I am hoping somebody can help me, I have a monsoon twin pump with 2 varem pressure reducing valves. This pump serves the shower in the ensuite and the main bathroom shower. The shower in the ensuite works fine but the shower in the main bathroom needs you to shake it before the water starts flowing. I understand that I need to alter the pressure but how do I do this? your help would be greatly appreciated.

[marygrace]

well, you should contact the person who really knows it or google some resources online if you want to do it by yourself.