Hey I thnk I may have a very small leak, were the radiator valve tightens on to the rad tail on some radiator valves I have fitted. There is no drip or sign of water under the valve but it feels wet on the joint. Is that a tiny leak or could it be something else?
There are two types of joints between the rad valve and rad tail - an olive or 3/4" union. Before assembling, I usually put a smear of Boss White or similar on the olive or union face.
Failing that, you could try some Fernox LSX in the same place.
Its coming from the 1/2 inch nut on the tail that connects to the rad valve. I put 20 wraps of ptfe on the tail tapeDr towards the end that enters the rad first. They are damfoss valves I have fitted. I have fitted rad valves before and never had a problem. Can Damfoss ones be trouble some?
Its coming from the 1/2 inch nut on the tail that connects to the rad valve. I put 20 wraps of ptfe on the tail tapeDr towards the end that enters the rad first. They are damfoss valves I have fitted. I have fitted rad valves before and never had a problem. Can Damfoss ones be trouble some?
Yes, the threads seem poor and easy to cross thread. Try some more tightening, they seem to need quite a lot. The olive on them seems pressed onto the tail and needs a lot of force to 'persuade' it along a bit into the valve opening. If not, try some sealant.
If ever I get a problem with weeps on new rad valves, it's always Danfoss.
Ok thanks, I will try to tighten abit more, I have a bigger spanner which will give me more leverge that might be able to give it abit more. I was scared of over tighening.
Yes it took a fair bit of force to knock the olive further on to the tail. If not I'll have to drain down, undo the valve and apply LS-X would you recommend. Is the first time I've had a problem like this don't thnk I'll be using damfoss valves again.
If you have a problem joint, it usually works. It's all very well to keep tightening, but there comes a limit. It's only a very slight gap that's causing the weep, and something like LSX is the ideal product to fill it.
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