Weeping Leak from TRV?

[cwcw]

We have a radiator that weeps when cooling down (i.e. overnight) from the TRV. When the TRV is removed, there is no small puddle waiting in the morning, but when the TRV is on, the small puddle is there. I'm not sure if this is just down to the TRV preventing evaporation or if the TRV itself causes a small leak somehow. Does anyone have any ideas, and how to fix?

Thanks.

 

[45yearsagasman]

Probably leaking from around pin and that means the gland seal is worn. Replace the valve is the short answer. To try a repair means draining down in any case, so just replace it. Not expensive. A better description and a pic of the valve would help.

 

[cwcw]

Probably leaking from around pin and that means the gland seal is worn. Replace the valve is the short answer. To try a repair means draining down in any case, so just replace it. Not expensive. A better description and a pic of the valve would help.

If I unscrew and remove the TRV it does not appear to leak at all. Is that possible or is it just that it is able to evaporate before I notice? It is a very small leak.

 

[Agile]

It probably just evaporates.

But it may also only be leaking when the pin is pushed down.

Regardless just replace it.

I prefer Drayton TRV4s

Tony