Easy to Replace Cartridge Concealed in Wall Thermostatic Shower Valve
Generally speaking,if this shower valve does notwork,what you need to do is to replace the cartridge;you do not have to replace the whole valve.What you need to do is to close inlet hot and cold water by screw driver . And then replace the thermostatic cartridge. Two outlet and Three outlet valves have the same price.
You do not have to damage the wall and tiles.