Please help on this O shaped kitchen drain issue.

[JHY]

I need replace my kitchen faucet but this drain pipe is blocking the path. Please take a look of the picture of the O shaped drain pipe. Not much idea of its function.
If I have to remove it to replace the faucet, what're the options to replace the O shaped drain pipe with?

More information on the picture, it's a single sink, next is disposal and then p-trap and then O pipe (?) going down to the basement which is accessible. Any comment is appreciated.
Thanks a lot.

 

[Reach4]

Please take a look of the picture of the O shaped drain pipe. Not much idea of its function.

The person who put that in did not understand it either, unless he figured to baffle with BS.

You want something more like this:

 

[Sponsor]

 

[JHY]

That's what I'm thinking too. Thank you very much.