Hi
Have a leak from the joint of valve to radiator that's started dripping a fair amount, and was going to isolate the radiator before getting an engineer to sort it next week when they come to service the boiler.
However the end where I thought there would be a lockshield with the flat head to turn has this valve - anyone know how best to isolate it - it's sort of rounder or oval, with a thread in the centre of it. I've browsed around but can't see any other like it.
Many thanks