I have a brand new radiator system and I am trying to remove one of my radiators. I don't know how to shut off the valves at either end. On the left I have a valve that switches on/off with an Allan key and the other and the top right hand side has the thermostatic valve on it. I set the thermostatic valve to the o position which I think is off. How do I know if both are off? I opined the little bleed valve at the top left hand side but water keeps coming out. Does that mean that one of the valves is still open? Any help would be great!