I have an Inta Ion Bar shower mixer. It was bought from Screwfix about 3 years ago, though I can't find the same one in their catalogue now. It's a standard bar mixer with G3/4 inlets spaced 150mm apart, and one know for flow, and another for temperature. It has lately become eratic in operation, with the temperature going cold. It is NOT a supply problem, both hot and cold are still adequate pressure and the hot water is still plenty hot. So my two options are try and fix it, or replace it. If I look at the installation manual, it says the thermostatic cartridge can be removed and cleaned - for instructions contact Inta. So any pointers how I remove it, and what to look for to determine if it is just cloged with debris, or actually failed? Alternatively can anyone reccommend a replacement. MUST be G3/4 fittings 150mm apart (i'm not ripping out the plumbing, re tiling etc) The only ones now in SF are 200mm or 300mm (SF part No's 31693 and 83093) but is that overall width, or pipe spacing centre to centre?