I need to remove a radiator from the wall.
When I set the thermostatic radiator valve to it's zero position and disconnect the outlet of the valve I get a strong flow of water.
The water is definitely coming from the supply side and not from the radiator.
How can I stop the flow / close the valve?
I thought that there was a cap which would screw onto the top of the valve once the thermostat part had been removed - but the plumbing shop told me there was no such thing... If there is, what is it called?