Drayton thermostatic radiator valve (TRV) - help identifying

[aljrob]

Hi all,

I have two of these TRV's (clearly of some age!) which no longer appear to work - even on the minimum setting the radiators get very hot.

View media item 51990
Does anyone know what model number they are, and if so if there's an easy way to replace the head, and with which model?


Thanks for your help,

Aljrob

 

[45yearsagasman]

TRV 3 or 4 I think. Before you go changing the heads, does the pin move freely? They are notorious for seizing and the valve may have to be replaced as a whole.

 

[Boilerman2]

That's a Drayton TRV3
you can get a TRV3 Adapterkit to convert to TRV4 head (current model)
as said can the pin be pushed in manually? if so the head is probably shot!