I currently have a hudson reed kia mixer valve with a rainfall shower head and would like to add a flexy hose and shower head mainly for easier cleaning of the shower etc. I can access the pipework so my plan was to add a diverter valve in the pipe that runs to the shower head then run a pipe from that to wall union. My problem is finding a suitable diverter valve that I can fit a hudson reed knob to does anyone know of a suitable valve or can direct me to someone who can help.