How to Install a Dishwasher to a Double Sink

Keep your dishes clean with a dishwasher next to your double sink.

Double sinks are convenient to have in kitchens. Their larger sizes allow you to store and wash more dishes at one time. If you've decided that a double sink isn't quite enough and want to move up to a dishwasher, you're in luck. Installing a dishwasher to a double sink is no different than installing it in any other location. As long as you have the three utilities a dishwasher needs: sewage, water and electricity, you're good to go.

Difficulty:

Moderately Easy

Instructions

Things You'll Need

• Dishwasher
• Dual water supply valve
• Plumber's tape
• Adjustable wrench
• Hose clamps (2)
• Screwdriver
• Wire nuts
• Electrical tape
• Wire cutters

1. Ensure that the dishwasher has its own dedicated circuit and run wire to the location next to the double sink. If you do not have a circuit installed, you will have to have a professional do it for you.

2. Prepare the water hookup. Install a dual water supply outlet valve at your hot water hookup if you do not already have one. If you do have to install one, make sure that you turn off the water at the main before you unscrew the old valve. Reconnect the kitchen sink water supply hose afterward. Wrap the free dual outlet with plumber's tape. Connect the water supply hose. Thread the coupling hand tight at first, then an additional turn with the wrench.

3. Move the dishwasher so that it is adjacent to it's new location by the double sink. Remove all shipping materials and packing.

4. Attach one end of the drain hose to the sewage connection at the double sink. This could either be the double sink trap or a garbage disposal, depending on your setup. Secure this with a hose clamp. Connect the other end to the drain outlet on the dishwasher. Create a loop in the drain line by attaching it to the wall or the back of the cabinet with a hose clasp so the middle portion of the drain is higher than both the outlet on the dishwasher and the inlet on the sewer connection.

5. Move the dishwasher into it's final location. Remove the bottom portion of the front panel so you can access the water and electrical hookups.

6. Connect the electric wires to the terminals on the dishwasher. Secure in place with screws or wire nuts as necessary. Cover any bare wires with electrician's tape.

7. Connect the water supply. In most dishwasher models, you will first have to insert an elbow joint into the water inlet, and then connect the supply hose. Use plumber's tape on all the threads as you connect them.

8. Close the dishwasher door and run a cycle on an empty dishwasher. Check for leaks and proper operation. Tighten any clamps, screws or couplings, if necessary.

Tips & Warnings

• Some municipalities require what is known as an "air gap" in the drain line. Consult your local codes before installation.

• The above steps are just a guideline. Always follow your manufacturer's instructions.

• If unsure about any of the steps above, consult a professional.

References

• Handyman Matters Video: Dishwasher Installation
• Reader's Digest: Dishwasher Installation

Resources

• This Old House: Installing a Dishwasher