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Plumbing Basics: What’s Going on Under My Sink?

Brian Gregory

By Brian Gregory
Updated September 23, 2019

Our video will help you understand the basic components found underneath a sink so you can take on a variety of plumbing repairs as well as bathroom and kitchen upgrades.

Skill

Beginner

Time

Few Hours

Five Sink Plumbing Basics

  1. To unclog a sink, use a sink plunger rather than a toilet plunger. The flat-bottom suction cup design forms a tighter seal around sink drains.
  2. You can open some clogs by removing and cleaning the drain stopper and P-trap. See Unclog a Sink, Tub or Shower for instructions. Some P-traps may even have a clean-out plug that allows you to insert a drain stick without removing the trap.
  3. If a plunger or a drain stick won’t work, a chemical drain cleaner can clear severely clogged sinks. Always follow the manufacturer’s safety instructions on all products. Read the Drain Cleaner and Opener Buying Guide.
  4. Stop sink sprayer hoses from tangling under your sink by wrapping them with tubular foam pipe insulation.
  5. If you can’t repair a dripping faucet right away but want to stop the noise, turn off the water supply under your sink, or tie a string around the end of the faucet to allow water to run down quietly. Read How Do I Shut Off My Water?
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