Another Question about Bathroom Sink with Overflow

[John Gayewski]

Yeah it's accepted as it is in the receptacle. If this was on the piping system it wouldn't be acceptable. But it's a maintenance item that gets changed out from time to time.

 

[Tuttles Revenge]

The sink assembly isn't intended to be a snug fit. Its intentionally built the way it is so that overflow water in the overflow chamber can easily reach the overflow holes in the assembly no matter its axial orientation.

Sealing of the sink is managed in 2 ways. The wide flange on top is just to keep water in the bowl and will only do so if its sealed properly. The wide rubber gasket on the bottom side is what keeps the sink from leaking. It seals both against the sink and against the drain assembly.

 

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[Newguy416]

I have this exact same question. So is it normal to have water (while it isn’t much) that sits outside the overflow drain holes, between the sink and downspout/drain? Water can go down the sink, and escape out the overflow holes, sitting there. Same if it does the overflow route, as the overflow in the drain isn’t 100% flush with the overflow in the sink. It is lined up, but the drain isn’t a little bit smaller than the sink hole. So any water that feet behind the drain overflow holes just sits there.