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  • I suspect it’s the trv I just removed it and it started weeping a bit

  • If you dry it and put some paper towel around this area, you'll be able to see where the leak is coming from when it gets wet. PTFE tape around the spindle might help. Some fixing tips for radiator leaks on: bestheating.com/info/how-to-fix-a-leaky-radiator

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