My mixer shower has given up the ghost after 7 years so not too bad but a new cartridge is £140 so looking at buying either just a new mixer valve or the complete kit. Present mixer shower is the normal exposed type not the bar mixer variety. It seems the exposed bar fitting kit/brackets make fitting of bar valve a lot easier especially if you need to take off the valve for servicing or fit a new valve. My question is if I say purchased say for example a Triton exposed bar fitting bracket kit will only Triton bar shower connect to it or are the kits universal so I could fit another brand of valve? I must admit I never took any notice but the hot water pipe for shower is on the right! So plumber installed old mixer shower upside down but fortunately you do not notice. I need to rectify this so have two options. One is to swap pipes above the ball valve to shower which would involve several bends or modify the hot & cold pipe coming from combi. This in theory would be easier but not sure if I would have to drain the boiler which if I did that would not be a job for me. Lastly and this is really a petty question really but here goes. My present shower riser rail is in perfect condition so a bit hesitant if I purchased a mixer valve compete with rail that I would have to drill new holes in tiles as I doubt if screw holes would match. The shower hose is as far as I know is a universal fitting but is the shower head as well?? My rail is Triton so would only a triton head fit the hose/shower head retainer. I have read several times that it is best to have the shower head made by the manufacture and matched to the shower. Thank you for any help and I am not very good at explaining things clearly so please ask me to clarify if needed.