Plumbing and drains

[ma cashflow]

kitchen sink backs up, all pipe lines are clean. outside drainage is clean. Can it be the set up underneathe the kichen sink ot correct?

 

[Meadowlark]

I would try a couple of things before taking it apart and/or getting a plumber. First hit with CLR as directed and then hours later hit again this time with Green Gobbler drain cleaner. Both of those have saved me many visits from a plumber.

Once you get it working again then make that apart of your routine maintenance.