Purchasing a replacement garbage disposal unit typically costs between $150 and $450 depending on horsepower (ranging from 1/3 HP to 1 HP) and brand quality like InSinkErator or Waste King. Because manufacturers generally integrate the motor directly into the sealed grinding chamber housing rather than selling motors separately, you must replace the entire disposal assembly rather than just the motor. Professional plumbing installation adds $150 to $300 in labor fees. Verification: Check under the sink for leaks and verify horsepower specifications before purchasing a replacement unit.
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