Leaking radiator valve help

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Hi

Just moved into a new flat and i found that one of the radiators has been leaking (and it looks like for while too). I will try and expla

On closer inspection i can see that water is coming out from the join underneath the nut on the thermostat and also some water is forming on the surface of the other valve (when the cap is removed). see pics.



I know nothing about sorting out radiators, so any help in what steps i should go about to fix this would be great. As far as i know this is the only leaky radiator. I've tried stop leaky pipe compound, but it did not work as the pipe was still leaking as i tried to fix it and the putty never dried.

thanks
 
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You have to drain system and replace the faulty valves.

Its best to replace all the valves when drained and to refil with inhibitor.

Tony
 
Hi

Thanks for the reply - how would i go about draining the system? Would it require me going up in the loft to the water tank?

Thanks

Karim
 
Agile said:
You have to drain system and replace the faulty valves.
Or you can freeze, but you have to be confident that you can replace the valve in the window of opportunity.

Its best to replace all the valves when drained...
It's best to leave things alone until they go wrong.

z3usx said:
how would i go about draining the system?
Have you read the FAQ and Wiki, or searched the forum?

Would it require me going up in the loft to the water tank?
Yes - is there a problem in doing that?
 
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Or you could tighten the nut on the trv (might not work though) and repack the gland on the lockshield.

2 minutes work, could last for years.
 
Hi

Thanks, i will try tigtening the nut on the TRV first but don't really understand what your mean "repack the gland on the lockshield" - whats the gland?

I don't think i have an expansion tank (no copper boiler thing) - any ideas on what type of central heating system i have. Will try having a look at the water tank tomorrow.

thanks for the help
 
CHange the trv? Why?
To expand on what Dan said, those nuts are often overtightened, in which case further turning does no good. Usual fix would be to replace the oplive on the pipe under the nut, or wind some ptfe tape round it. Both need the system to be drained or frozen or plugged up...
 
cool - well i see if it is easy to budge if not i'll leave it. Been searching how to drain radiator system, so need to find out what type of CHS i have.

Thanks for the help
 

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