my grandaughter has removed the valve from the radiator while her mom turned her back for a couple of seconds. (Isn't it always the way?). It is a valve with the numbers on it going up to six. When my daughter tried to get it back on, it wouldn;t go. There is a metal ring at the bottom with a thread on it, but there does not appear to be anything which this thread screws on to. I have had a go and cannot do it either. We did not try pushing it on, as I thought that the fact that it had this metal thing on it meant we had to screw it on. We did think of asking my grandaughter aged 2 to put it back on but failing that, can anyone please provide an answer. Thank you in advance.
Foxy - If the top of the valve that you have in your hand has a threaded ring that spins - there should be a thread on bottom part attached to radiator that it engages with. I know you have tried - but it's got to be there.
There are some with baynet fittings - but that's not what you are describing.
It sould have setting on it 1 to about 6 make sure its on 6 and then try screwing it back on if not try it on the lowest setting cant remember which way round
Usually, the reason for that is that you have to "centre" the valve head onto the body in the right position for the thread to catch and the head to go down into place.
In other words.......... jiggle and rotate until it seats.......... then screw down .... trial and error :o(
Thank you all for your answers. Yes scotman, it did look like the pic you sent except it is a metal screw thingy at the bottom not white. I will try putting it on 1 or 6 joesdaddy and see if that works. Many thanks builder, at least now I know she has not broken it, we will perserveer and jig jig jiggle it a bit.
joesdaddy, good news, we turned it to one and still would not screw on, however, when we turned it to five (the highest setting) it screwed on, no problem. Thank you so much and to all other answers. So happy.