Thanks for your reply Chris. Please see attached image. So I first I would try and clear limescale without taking the fixture off the wall, and avoid having to turn mains water off and drain system. I can do this tmw but first wanted to check whether this piece broke down any further than this...
Hi there, I have same issue. I have followed your advice as far as I can, stripping down shower and cleaning but have not been able to completely breakdown the flow control parts, is there a trick to this (using 2 clamped tools to pull apart)?