What's this called? (bathroom waste pipe)

[mallyo]

Hello, can any advise me what the picture is? I've been advised to get this for me bathroom sink waste. Thanka

 

[Mottie]

Overflow pipe?

 

[terryplumb]

It is a waterless trap. ( Doesnt rely on water to prevent drain smells entering the room ,like a conventional trap does)

 

[mallyo]

Do they work? (stop the smell?)

 

[kidgreen61]

Looks like a flexi to me, granted not the best pic?

 

[Madrab]

It's a wirquin low level waterless trap, usually supplied/required for when there's a basin on vanity unit that has a top drawer.

They do work yes but I find they can get clogged up after a while and need cleaned, - depends on how they are used/what goes down the drain.