Bathroom Sink not draining immediately

[NC1]

Hi I have a sink which i have snaked, removed the trap and cleaned out, but when you turn on the tap it fills about to 1/4 to 1/2 before it starts to drain. What could be the issue? Thanks in advance. Nav

 

[Cacher_Chick]

Check the pop-up for a hair mass in the tailpiece.
The drain piping probably needs to be cleaned for a longer distance.

 

[Sponsor]

 

[NC1]

thanks. Forgot to mention that once it fills up to that level it drains immediately. Like there was no blockage to begin with.

 

[hj]

How about a photo of the sink? It sounds like you have a "vessel sink" because that is what they do.

 

[FullySprinklered]

I've run into a lot of pop-ups that just didn't open all that much. The higher water level would give it more push, but I really feel like there's an engineering problem there.

 

[Plumber69]

By chance does your drain look like this? If so that's normal. There is a way to get around it. That is to drill the holes slightly bigger