Does any one know what would cause this?
When you turn on the hot water tap upstairs or downstairs the mains feed pipe coming up from downstairs vibrates against the rafters and then makes a humming noise so loud it can be heard outside in the street.
When you turn on the hot water tap upstairs or downstairs the mains feed pipe coming up from downstairs vibrates against the rafters and then makes a humming noise so loud it can be heard outside in the street.