Carefully pull the P-trap straight down. Empty its contents into the bucket.

If plunging doesn't work, the clog is likely deeper in the curved pipe under the sink (the P-trap).

Place a standard cup plunger firmly over the clogged drain. Tilt it slightly to let air escape from the cup, ensuring a pure water-to-water seal.

Push down gently to expel the remaining air, then apply . The upward, pulling motion is just as important as the downward push for breaking up debris.

The clog is downstream from where the two lines meet.

If the P-trap is empty but both sinks remain deeply flooded, the clog is deep inside the horizontal drain pipe behind the drywall. You will need a manual plumbing auger (drain snake). Remove the P-trap using the steps outlined in Method 5.

Take the hex wrench (Allen key) that came with the unit and insert it into the flywheel turning hole located at the very bottom center of the disposal exterior.