related question - when a radiator is disconnected/bled and these pipes isolated (i.e. thermostatic valve set to 0 on one side, valve closed on the other side), can I use the rest of the system?
Some (all?) thermostatic valves need a "decorator's cap" fitting in place of the head or they leak. I had this happen and it was bad. Woke up to warped floorboards.
It's just a plastic cap you screw down to keep the valve pin depressed.
related question - when a radiator is disconnected/bled and these pipes isolated (i.e. thermostatic valve set to 0 on one side, valve closed on the other side), can I use the rest of the system?