

40 mm basin hole but too small for 40 mm drain
I have a 40 mm basin but I can't put a 40 mm drain on it because the original basin drain hole is a bit too small. I have to use a 32 mm drain with overflow. The problem is because theres is a gap of about 4mm between the 32 mm drain and the wall of the 40 mm basin hole, water from the overflow run into the bottom of the sink.
1. Does it matter if some water run into the bottom of the drain. I reckon when it rises it will flow out through the overflow.
2. Is there an adaptor to make the 40 mm into a 32 mm drain hole?
Thanks