How to Plumb a Dishwasher to a Double Sink

In the world of kitchen convenience, a dishwasher is undoubtedly a modern marvel. Gone are the days of endless scrubbing and washing dishes by hand. However, if you have a double sink in your kitchen, you might be wondering how to plumb a dishwasher to it seamlessly. Fret not, for in this comprehensive guide, we will walk you through the process step by step, ensuring that you can enjoy the convenience of a dishwasher without compromising the functionality of your double sink setup.

Tools and Materials You’ll Need

Before diving into the installation process, it’s essential to gather all the necessary tools and materials. Here’s what you’ll need:


  1. Adjustable Wrench
  2. Screwdriver
  3. Tape Measure
  4. Pipe Cutter
  5. Pliers
  6. Hacksaw
  7. Channel Locks
  8. Plumber’s Tape
  9. Bucket


  1. Dishwasher Installation Kit
  2. Sink Tailpiece
  3. Hose Clamp
  4. Tee Fitting
  5. Compression Fittings
  6. Plastic Tubing
  7. Pipe Straps
  8. Hose
  9. Check Valve

Step-by-Step Guide to Plumb a Dishwasher to a Double Sink

1. Preparation

Begin by turning off the water supply to your sink. This can usually be done by shutting off the water valves located under the sink. Once the water is off, place a bucket under the sink to catch any remaining water in the pipes.

2. Remove the Sink Tailpiece

Using your wrench and pliers, carefully remove the sink tailpiece from the sink’s drain. This will create space for the dishwasher drain hose.

3. Connect the Tee Fitting

Now, take the tee fitting and connect it to the sink’s drainpipe. Make sure it’s securely fastened using your wrench. The horizontal part of the tee fitting should be facing towards the dishwasher.

4. Install the Check Valve

Slide the check valve onto the dishwasher drain hose. This valve prevents wastewater from flowing back into the dishwasher. Secure it in place with a hose clamp.

5. Connect the Dishwasher Drain Hose

Connect one end of the dishwasher drain hose to the check valve and the other end to the horizontal part of the tee fitting. Ensure that both connections are tight and leak-free.

6. Secure the Hose

Use pipe straps to secure the dishwasher drain hose in place, keeping it elevated and preventing any kinks or loops that could impede drainage.

7. Connect to the Dishwasher

Follow the manufacturer’s instructions to connect the other end of the dishwasher drain hose to your dishwasher. This connection is typically found at the rear of the appliance.

8. Test for Leaks

Before turning the water supply back on, double-check all your connections for leaks. If everything looks secure, turn the water supply back on and run a test cycle on your dishwasher to ensure proper drainage.

Final Thoughts

With this step-by-step guide, you can confidently plumb a dishwasher to a double sink, enjoying both the convenience of a dishwasher and the functionality of your double sink setup. Remember to take your time during the installation process, ensuring all connections are secure and leak-free.

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