Discussing over dinner the WCs we have known and loved (as one does) the conversation turned to a new-build house we visited in Derbyshire.
The downstairs WC and hand basin seem to be coupled. The WC flush appears to operate normally but when one empties the contents of the washbasin, the water in the u-bend of the WC is sucked down a little.
It doesn't appear to be causing any harm but is this normal these days? Or just normal for Derbyshire?
Nick