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How to Install a New Dishwasher

When it comes to installing a new dishwasher, you need not to hire a plumber for this. It is very easy and you can do it yourself. You just have to follow the following steps. However, before you start, make sure the following tools are available to you, as you will need them in the process.

Installation Process. The following steps will let you know how you can install a new dishwasher. We have assumed that you are replacing an old dishwasher with a new one. Therefore, the procedure starts from removing the old dishwasher first and then installing the new one.

Things You'll Need

  • Screwdriver
  • Multimeter
  • Slip-joint pliers
  • Needle-nose pliers
  • Adjustable wrench

Shopro Professionial 10-Piece Plier Set

Shopro Professionial 10-Piece Plier Set

More pliers and wrenches


  1. Turn off the water supply at the valve.
  2. At the electrical service panel, switch off the power for the dishwasher.
  3. At the top of the dishwasher counter flange, you will find some screws. Unscrew them with the screwdriver to remove them.
  4. Now pull out the bottom cover.
  5. Be very careful. Make sure that you have turned off the power. Open the electrical box to confirm the same. You can do it by attaching the black multimeter contact to the ground and then touching the red contact to the white wire and the black wire.
  6. At the end of the wires, attach wire nuts. Now remove the wires from the terminal screws and tuck them out of the way.
  7. Find out where the water supply is located under the washer.
  8. Disconnect the water supply line from the water inlet by removing the nut.
  9. Loosen the clamp and remove the hose to disconnect the drain hose from beneath the sink.
  10. After disconnecting all the attachments, place a blanket in front of the dishwasher, slowly lift up the dishwasher and put it onto the blanket.
  11. Keep a towel ready with you because in this process of lifting up the dishwasher and putting it onto the blanket, some water may spill out. If this happens, just wipe it with the towel.
  12. Now that you have removed the old dishwasher, clean the area where the old dishwasher was placed and where you have to install the new one.
  13. Position the new dishwasher on its back.
  14. Connect the drain hose with a compression clamp.
  15. Wrap the water line connection with Teflon tape and attach the 90-degree brass fitting that is used to connect the water line, also known as dishwasher 90.
  16. Adjust the front legs of the new dishwasher downward so that you can easily slide the unit into place. Meanwhile, with the help of an assistant, slide the drain hose under the sink.
  17. Connect the water line underneath the dishwasher to the dishwasher 90.
  18. Pass the electric cable through the sleeve on the dishwasher and tighten the same so that the cable could not be pulled out.
  19. Now make all the connections of the wire – ground wire to the green screw, white wire to white wire, and black wire to black wire. Use wire nuts to secure the connection.
  20. Connect the new drain hose at its previous position.
  21. Fill the water line by opening the hot water valve.
  22. Carefully examine if there is any leaks.
  23. If any leaks occur, recheck all the connections and test again.
  24. Once you are sure that there is no leaks or problem as such, go ahead.
  25. Adjust front legs of the dishwasher and position it properly on a level.
  26. Drive the small mounting screws into the underside of the countertop through the flange in order to attach the dishwasher to the countertop.
  27. Reconnect the water supply line.
  28. Turn on the power and your dishwasher is ready to operate.


  • Make sure the new dishwasher you buy is the same size as the old one.
  • If need be, you can find a plumber or professional contractor.

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