I have recently bought an ex-council flat that uses communal heating for the radiators. When I moved in, I discovered there was no valve on the radiator on the living room so I cannot easily turn off the radiator. Is there a way to attach, or will I just have to manually turn on and off the radiator every few hours that I want heat? (I assume this will also affect the other radiators in the property, as when the radiator in the living room is turned off, these do not work either).