Water won't drain from sink with garbage disposal

07/03/25 4:38pm
The garbage disposal works, but the water won't drain from the sink. When I take off the u-shape pipe, the water drains; and when I put it back on, the water backs up again. I checked the drainage pipe that extends beyond ghe u-shape pipe, and there were no cloggs in the pipe. I don't know how a pipe gets clogged since the garbage disposal chops materials up into little pieces.
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