Can my TRVs be saved?

[Deckie]

I found various makes of TRVs had been fitted to the radiators by the previous owners. One make in particular, Westherm four, all have the same problem with the pins. The pins aren’t stuck, they move freely up and down when using a pair of grips but they stay in the up or down position and don’t pop up under spring pressure. I’ve banged them a bit and sprayed them with WD40 several times over several days but the pins still won’t spring up from the down position.
I guess they are faulty but can they be saved somehow or is it time to call out the plumber to have them all changed?

 

[Rtplumb]

The best thing to do, in my opinion, is to replace the valves. These Westherm valves are basically a B&Q special and not worth repairing because even if you did manage to get the pin operating properly it'll only be a matter of rather short time before the problem recurs.

My preference for a good valve at a reasonable price is a Drayton valve. There are of course cheaper valves on the market.

Hope this helps.

 

[Deckie]

Many thanks Rtplumb, I’ve read on several other posts about Drayton valves particularly so will replace the old ones with those.