We have a room that has been unused and the radiator unused for about 10 years. It was turned off at both the TRV and lockshield ends but was never drained.
I want to bring it back into use - can I just open lockshield and reset TRV and should this be done with boiler off. Don't want to introduce air or unbalance rest of system...
many thanks
I want to bring it back into use - can I just open lockshield and reset TRV and should this be done with boiler off. Don't want to introduce air or unbalance rest of system...
many thanks