Can the bathroom washbasin mouth be replaced with a filter?

I think it's unhygienic, I usually use running water to wash my face and brush my teeth, which is cleaner, so it is recommended to separate the basin for brushing and washing my face.

This is possible, usually the pipe connected to the floor drain and the outlet end of the washbasin drain pipe are on the same pipe, they are just different in location.

It can be replaced, the faucet of the faucet can be detached, and the type of pairing should be paid attention to when changing. In fact, the function of that layer of mesh is more precisely to let the water flow produce bubbles, called aerator, and now many of them are made of ABS material, instead of metal mesh.

Must use a pipe wrench! In order to unscrew the faucet, it is recommended to find a professional to deal with it, otherwise it is easy to wring the faucet and leak during installation.

Toothbrush. I cleaned the drain filters with a toothbrush that I had used and didn't use.