Tapping (light knocking) pipes
Posted by Jas on November 19, 1999 at 09:18:38:
My pipes make a light knocking noise every minute or so. Ok during the day but very annoying at night. It's not related to if you are using the taps. Someone mentioned to me something about a heat exchanger on the boiler (it's an indirect system). Could it be this causing the noise? If not, any ideas?

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