hello i am decorating my kids play room that has a thermostatic valve on the rad. the rad has never worked that well and i know its not very eco friendly but i would like the rad to come on permanantly with the rest of the system. if i just take the white twisted top off, which i have already done in order to decorate, and dont replace once the rad is re fitted, so the pin is exposed, will it then work like a regular valve?