I've 2 valves under my stairs so I can isolate the downstairs rads, i've had cause to turn one a few times recently and now the bastard is dripping. I presume the only remedy is to replace it or is there some leak fix I could put in? (would you want to?) I'm not sure there's enough give in the pipework to change it easily.
I've had this problem elsewhere, is there something to look out for when buying these things to ensure I don't replace it with something equally s**te?