How to Plumb a Utility Sink

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A new utility sink is a handy add-on for any laundry or utility room. Unfortunately, in most installations adding a new feature like a sink will require some additional plumbing. If you've already installed new faucets and changed toilets, roughing in some new plumbing would be an excellent challenge of your plumbing abilities.

Things You'll Need

  • Utility sink
  • Plumbing tools
  • Propane welding torch & solder
  • Copper/PVC tubing
  • Drywall saw
  • Hacksaw
  • Pipe cutter

Intalling the Plumbing

  • Decide where you want your sink. The easiest option is to install it in a room that already has a plumbing supply, such as a laundry/utility room. For a cold water sink, you will need a cold water supply and a drain line.

  • Check the local plumbing codes in your area. If you're installing the utility sink in a laundry room, many municipalities prohibit sinks and washing machines from sharing the same drain line.

  • Turn off the water supply to the room in which you will be working. If the room has no cutoff valves, you will have to shut off the entire water supply for the house.

  • Set up the drain line for the sink. Again, follow local municipality codes for venting if you're having to install new lines. In older installations, you can tie new PVC pipes into iron plumbing. Use a pipe cutter to make quick work of any big pipes.

  • Install the water supply for the sink. You can cut into the copper lines with a hacksaw or pipe saw. For connections, you can either spot weld in new copper fittings, or use a PVC to copper connection. Be sure to install shutoff valves for your sink.

Installing the Sink

Tips & Warnings

  • Hooking up your sink with new PVC piping is easier for the first time DIYer than welding in new copper tubing.
  • Wear safety goggles and other protective equipment when performing any welding tasks. Make sure you are aware of the location of any electrical circuits when installing new wall plumbing.

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