I've currently got a drain cock fitted in-line in the tails to a couple of my downstairs radiators. These allow the system to be drained, but of course, not the individual radiator.
If I had these removed, and fitted one of these instead...
http://www.screwfix.com/p/angled-radiator-valve-drain-off-15mm-x/70408
...am I right in thinking that they still allow you to drain the system, but also allow you to drain the radiator only - ie if you close the radiator valves, undoing the drain cock on these valves allows water out of the radiator only? The only thing different to my current set up is that it wouldnt allow you to shut off the radiator individually and drain the rest of the system, although I have no idea why you'd want to do that.
Have I understood these valves right?
If I had these removed, and fitted one of these instead...
http://www.screwfix.com/p/angled-radiator-valve-drain-off-15mm-x/70408
...am I right in thinking that they still allow you to drain the system, but also allow you to drain the radiator only - ie if you close the radiator valves, undoing the drain cock on these valves allows water out of the radiator only? The only thing different to my current set up is that it wouldnt allow you to shut off the radiator individually and drain the rest of the system, although I have no idea why you'd want to do that.
Have I understood these valves right?