Why don’t Radiators come with valves supplied?
Radiators don’t come with valves because it’s better for you that they don’t. You not only need to choose which radiator valves you want because your pipework isn’t the same as everyone else’s, but neither is your taste in interior decoration. You get to choose exactly which radiator valves match: your radiator, the angle/direction of your pipework and of course, your room’s decor.
What does a Radiator Valve do?
Radiator valves control temperature and they always come in pairs. One is to adjust the water entering the radiator to adjust the temperature and the other to balance your system by affecting the amount of heat exiting the radiator.
In layman’s terms, they’re just little taps for your radiator and those taps are either referred to as manual or as thermostatic.