Heating system is 14 years old. On inspection I find that every lockshield valve is fully open. After adjusting some, I find that they weep slightly from the adjustment screw - valve type is as in attached picture, with only the adjustment screw behind the cap. Leak sealant is in the system - do I rely on this to do its job or is there another tip to make them seal better, or do the valves need to be replaced?
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View the thread, titled "Danfoss Lockshield valves leak after adjusting" which is posted in UK Plumbers Forums on UK Plumbers Forums.
Replaced but they might seal up over time
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