Current 43++ Bathroom Sink Overflow Leaking
Current 43++ Bathroom Sink Overflow Leaking. On some bathroom sinks the overflow is integral to the sink, but on most sinks, you will find that the overflow drain is basically not part of the basin, rather it attaches to the underside of the sink and finally to the drain assembly. This opening is located on the wall of the basis nearest to you, near the top of. When the tap is running with the plug in, and therefore the water escapes through the overflow, the very bottom of the sink casting gets wetter and wetter, then forms a rapid drip.