Jump up ^ "Sub-committee onpo East-West Economic Co-operation and Convergence and Sub-committee on Civilian Security and Co-operation Trip Report: Visit to Rome / Palermo Secretariat Report 6–8 May 1998 (Prefect Gennaro Monaco, Deputy-Chief of Police and Chief of the Section of Criminal Police)". NATO Parliamentary Assembly. August 18, 1998. Retrieved 2009-01-24.
Some higher-end units have an automatic reversing jam clearing feature. By using a slightly more-complicated centrifugal starting switch, the split-phase motor rotates in the opposite direction from the previous run each time it is started. This can clear minor jams, but is claimed to be unnecessary by some manufacturers: Since the early sixties, many disposal units have utilized swivel impellers which make reversing unnecessary.
For any major issues with the garbage disposal, you should leave the job to a professional plumber only. Reaching your hand into the drain is dangerous, even if you believe the power is shut off. A plumber can help you evaluate the state of your disposal, and decide whether or not you need a new unit. Upgrading to a faster disposal unit with a higher horsepower can help to protect your pipes and make cleaning up after meals even easier.