Why Does My Kitchen Sink Keep Clogging?

Clearing a kitchen sink and then having it block again a few weeks later means the blockage was thinned rather than removed, or the restriction sits further down the line than the tools reached.

The grease layer nobody sees

Kitchen drains carry fats that solidify as they cool. The result is not a single plug but a coating along a length of pipe, which is why a plunger can restore flow briefly without changing the underlying condition.

Garbage disposals do not solve it

Finely ground food waste still has to travel through the same coated line, and it binds readily to what is already there. Disposals change the size of the material, not the destination.

When the branch line is not the problem

If the sink blocks alongside another fixture, or if a floor drain reacts when the sink empties, the restriction is likely shared piping. That is a different problem to a kitchen clog.