Putting radiator back on

[divingmoose]

Hi,
We have been having a room changed around and things moved about and i am ready to put the radiator back on the wall. The pipes for the radiator have been turned off. One end with the normal + and - knob to turn it off. The other side has a thermostat and this has had a bronze like cap screwed onto the pipe were it would normally screw onto the radiator. I assume this has been put on because the thermostat could easily be turned back on by accident so assume this is to stop a leak if it was turned on. Do i assume that as long as the thermostat is off i can unscrew this cap and then attach the radiator again or am i missing something. i know i could ring the plumber to ask but don't really want to bother him if its something like i said above.
Thanks Lee

 

[dextrous]

Yes, but there might be a bit of leakage if the thermostat hasn't managed to close the valve completely.

 

[SUPERPLUMBER]

get yer missuses hairdryer to it before you take it off. The liquid inside will expand and close off the valve.