How to Connect Water Lines for a Bathroom Sink

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How to Connect Water Lines for a Bathroom Sink
Hooking up the plumbing to your sink is easier than you might think. (detail of faucet and sink with running water image by nextrecord from Fotolia.com)

Remodelling a bathroom is one of the most popular do-it-yourself projects, and one that can quickly add to the value of your home. If you're installing a new vanity and sink in your bathroom, you may be confused when it comes time to hook up the plumbing to the sink. Connecting water lines to a bathroom sink is a standard process that any homeowner can master in less than an hour.

Skill level:
Moderately Easy

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Things you need

  • Pliers
  • Rags or paper towels

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Instructions

  1. 1

    Search for the hot and cold water faucet connections that come out of the faucet; they will be high inside the vanity at the back of the sink.

  2. 2

    Screw one water line to the hot-water connection and the other water line to the cold-water connection, using your hand to screw the connection on and then tightening the nut with a pair of pliers until it is snug.

  3. 3

    Attach the other ends of the water lines to the water supplies at the bottom of the vanity in the same manner, taking care to connect the hot-water line to the hot-water supply pipe directly below it and doing the same for the cold. Tighten with pliers as before.

  4. 4

    Turn on the hot-water shutoff valve directly below the new water connection; check the new hot water line for leaks at both the top and bottom connections. Tighten any leaking connection with pliers until the leak stops.

  5. 5

    Repeat the previous step with the cold-water shutoff valve, again taking care to check for leaks at each connection.

Tips and warnings

  • If your water supply lines are metal, wrap the threads with a 2-inch piece of Teflon tape before connecting the water line.

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