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Justin Smith 27453

Hi all, Drain Valve in VaillantWH40 Low Loss Header drips occasionally - say equivalent of t-spoonful over a day . Can I do the following to fix it please:
1. Turn off all incoming and outgoing pipes to the Low Loss Header and unscrew the Drain Valve.
2. Clean the Drain Valve and apply PTFE tape to the valve and Install it back on again.
3. Turn ON all incoming and outgoing pipes to the Low Loss Header.
Would the above process work or do I need to do anything else. Also would this have any impact on Hot Water unvented cylinder / Hot or cold water flow / Central Heating system. I would be most grateful for your response and help. Many thanks.
 

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