Minor leak from incoming pipe to downstairs radiator

[Glyn1959]

The pipe connected to the thermostatic valve goes in at a slight angle (i guess it has been knoccked at some stage). I do not want to bleed the system as the leak is so minor. I bought some "putty" like material that you mix and mould around the pipe but unfortunately it has not stopped the leak. However, I have used this maeterial before successfully. Does anyone know of anything else on the market to do the job?

 

[masona]

Is the leak coming from the radiator nut to the valve or from the compression pipe with the olive ring into the valve?

 

[zeroseven]

Sorry to jump in on this but I have a similar problem - leakage from the pipe side of the valve. I tried undoing the thread and wrapping PTFE tape (or whatever its called) around the thread but no joy. If its this 'olive ring' you mention, how do I find / replace it?

Apologies for dumb question btw.

 

[breezer]

you shouldnt have to replace the olive, just tighten up the joint as this should make a better seal.

for more about olives see this

 

[zeroseven]

Thanks breezer - think I may have overtightened the joint already!!

 

[masona]

You will need 2 people to do this job.Make sure the central heating/hot water is switch off & shut down radiator valves.Wrap a towel round the pipe then undo the nut on the valve(where the leak is) while the other person is holding it together to stop it coming apart,if it start to leak badly tighten up the nut again & drain the system down,if it okay then apply Hawk White Jointing Compound around the olive ring and tighten it up.

WARNING:This is for a minor leak only and NOT a practical way of doing this unless in an emergency.Be prepare to down drain down the system if it goes wrong.

Zeroseven : The olive ring is inside of the nut which tighten the copper pipe into the valve.Try tighten it up a little bit more.If that failed it probably overtighten then read above.