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Hi, I need to turn off the hot supply to a tap in a downstairs bathroom. I closed the valve on the cold input into the hot water cylinder and this stopped the water in all the hot taps except the one I need to work on. The flow slowed to a constant drip but would not stop completely. I had assumed it was just the water in the pipes, but having left it for a long time, the drip was still there.
I'm guessing I'll have to drain the attic tank to do this now, but I'm curious as to how there was still a drip in this tap, although all the others, including the kitchen were dry? If the gate valve is still letting some water through, would it only be seen in this one downstairs tap like this?
Thanks!
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