How to replace the gasket on a kitchen sink drain

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The kitchen sink drain has several components, each interlocking with another. The assembly consists of a strainer body, rubber gasket, metal washer and a large locknut or retainer. The strainer is mounted to the body by a straight tailpiece with a threaded coupling. Removing and replacing a gasket from the strainer is fairly simple with a monkey wrench. Should a garbage disposal be attached, however, the procedure is much more involved.

Skill level:
Moderate

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Things you need

  • Monkey wrench
  • Rubber gasket

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Instructions

  1. 1

    Clear everything out from under the sink. You will see a rubber gasket and a metal washer under the drain as it connects to the drainpipe. There will be a large locknut holding the body of the drain in place.

  2. 2

    Unscrew the locknut. Remove the friction ring and then remove the rubber gasket. Be careful not to inadvertently bend the drainpipe assembly or loosen the elbow joint.

  3. 3

    Clean out the drain of any debris. Attach the new rubber gasket, then the friction ring and re-tighten the locknut.

Tips and warnings

  • If your sink has a garbage disposal attached, seek advice at a hardware store or home improvement centre on how to remove/replace the sink drain gasket, or enlist the services of a plumber. You can also find information with the user's guide to the disposal that may include the steps needed in the process.

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