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How To Hook Up Dishwasher

How Does A Dishwasher Hookup To Water

Dishwasher Plumbing Hookup

The water-supply connection is an easy matter of connecting one end of a braided steel supply tube to the water inlet valve on the dishwasher and the other end to a shut-off valve on a hot-water supply pipe.

Where is the dishwasher water supply?

Incoming water supply to the dishwasher is usually located under the kitchen sink. Locate the hot water supply under the sink, look for a pipe that branches off towards the direction of the dishwasher.

What water connections do you need for a dishwasher?

Water supply: A dishwasher needs hot water. The closest source is the hot water supply under the sink. Replace the shutoff valve with a new one that connects both the sink and the dishwasher to the hot water line.

What To Do Before Installing A New Dishwasher For The First Time

There are lots of rules you need to be aware of when installing a dishwasher for the first time. Because dishwashers use both water and electricity, the risk of a catastrophic outcome should something go wrong is much higher than for most other appliances the rules exist to keep you, your home, and everyone else safe.

Dishwasher installation tools

As well as the tools needed for a replacement installation, you’ll need a couple of other things:

  • A drill, hole saw or other means of making a 100 x 150mm hole in the side of your cabinetry
  • A crowbar or similar for removing cabinetry
  • Sealant for protecting your benchtops from steam and water damage
  • A brush or roller to apply the sealant
  • A new tap connection
  • A new drain connection with an attachment for the dishwasher drain hose
  • A new power outlet and the right cabling.

Your plumber and electrician will probably be able to supply the last three items.

Getting started

Under the Building Code of Australia, power points and water pipes can’t be installed in the same cabinet void as your dishwasher instead, your drainage, power and water supplies must be installed in the next cabinet along, with hoses and cables passing through a small hole to the appliance. Ever wondered why your dishwasher’s plug is under the sink, not behind the appliance? It’s to reduce the risk of electrocution if it springs a leak.

Getting in licensed tradespeople

Other important things to think about when installing a dishwasher

Step : Connect Your Portable Dishwasher To Electricity

Check your owners manual for any safety or installation-related information, and follow the manufacturers recommendations for connecting your dishwasher. As a rule of thumb, youll probably need at least 15 amps for this stepjust be sure that the circuit youre using has enough capacity to handle the load. If you dont have a dishwasher already, install one dedicated line if possible.

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Wrong Side Of The Trap

The first problem is the dishwasher drain is connected to the sewer side of the trap. Water always sits in the bottom of the P-trap, and this prevents sewer gases from coming into the house. The dishwasher drain must be connected before the P-trap, not after it, which is what was done here. With this improper installation, sewer gases have the potential to come back into the dishwasher. The diagram below right shows a proper installation.

The diagram below right shows a proper installation.

Attach Water Supply Line

Thread: Dishwasher hook up

The dishwasher connector kit also includes a braided steel water supply tube. Thread the coupling nut of the supply tube onto the dishwasher 90 fitting, and tighten with channel-lock pliers or an adjustable wrench. This is a compression fitting that does not require pipe joint compound. Be careful not to overtighten, as it is possible to strip the threads.

The Spruce / Kevin Norris

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Still Wondering How To Install A Dishwasher

If youre still wondering how to install a dishwasher, its probably time to call a pro. After all, they know exactly what to do. They are also licensed and insured, meaning theyll back up their work in the event of a misstep.

To connect with a local appliance repairman, simply enter your information into the above form or popup and youll be paired with a top-notch contractor. Its really as simple as that!

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Remove Your Existing Dishwasher

Start by finding and removing your dishwashers toekick. The toekick is a metal plate at the base of your dishwasherit should be easily removed with a screwdriver, and will allow you to see underneath your dishwasher.

Once the toekick is out, youll want to unscrew the leveling legs found in each of the four corners of the dishwasher base. You can do this with your arms or an extended wrench, just make sure you start with the legs in the back. By unscrewing the leveling legs, you will create space between your dishwasher and the counter, allowing you to slide the dishwasher out once youve created enough.

If you cannot comfortably reach under your dishwasher or get the leveling legs to budge, call a handyman to help.

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What To Consider Before Installing Your Dishwasher

The Bosch 800 Series SHPM88Z75N is the best dishwasher you can buy.

Before you get your new dishwasher, youll want to make sure your kitchen is fully prepped to have the new dishwasher delivered . Start by measuring everything to make sure you have the clearance in your home to have a new appliance delivered, measuring the space where your dishwasher will go to ensure a snug fit, and clearing out enough space in your home to house the new dishwasher while you prepare to install it.

Next, youll want to get all the tools you need to complete the job. Your dishwasher delivery will include smaller tools like screws, brackets, and clamps, but youll want to have some standard home improvement tools on hand, like a screwdriver, pliers, wrench, measuring tape, power drill, and flashlight.

Finally, you may want to consider calling in a buddy to help you through the process, either physically or emotionally. I was lucky to have a live-in spouse who did all the things I didnt want to . A delivery team will be able to move the appliances, but a buddy can help trade-off if youre struggling with a screw, or provide much-needed positive reinforcement throughout the journey.

Connect The Drain Line

How to: Install A Dishwasher


Remove the dishwasher from the box and lay it on its back to look at the connection areas underneath. Your dishwasher will come with a drain hose that needs to be connected to the dishwashers drain line.

Remove the cap over the drain line connection and attach it to the drain hose. If a little water comes out of the drain hose, dont worry.

Its from the factory testing. You will want to use a small hose clamp to be sure it is securely in place. Thread your drain hose through the hole connecting to your sink so it can be attached later.

Now, slide your dishwasher into its cabinet space. Use a wrench to adjust the height of the dishwasher legs to fit flush with the countertop above it.

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How Long Does It Take To Install A Dishwasher

It generally takes about an hour to an hour and a half to install a dishwasher. This depends on your expertise and familiarity with the different fittings and pipes below your sink.

installing a dishwasher could take a longer or shorter amount of time. If you have to remove a cabinet to create a space for the dishwasher, it will take longer.

Hook Up The Water Supply

Your dishwasher connector kit includes a dishwasher 90 that will serve to connect the water supply to the dishwasher. Installing the dishwasher 90 is the first step to hooking up the water supply for your dishwasher.

Locate the water inlet fitting on the solenoid valve. Apply some pipe joint compound to the threads of the dishwasher 90 fitting, then thread it onto the solenoid valve. Tighten fully by hand, then tighten an additional 1/4 turn with channel-lock pliers or an adjustable wrench.

The Spruce / Kevin Norris

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Remove The Old Dishwasher

Before you begin removing the old unit, read the manufacturers instructions for how to install a dishwasher. It may contain information specific to your new appliance, such as additional parts that might be needed for the model.

  • Shut off the electricity to the dishwasher at the circuit breaker.
  • Turn off the water supply at the shut-off valve under the sink.
  • Use a screwdriver to remove the front access panel near the floor.
  • Disconnect the old wiring connections located in the terminal box.
  • Disconnect the old water supply line from the dishwasher using an adjustable wrench.
  • Place a shallow bowl underneath the connection to collect any water that leaks after you remove the nut.
  • Disconnect the drain hose from the dishwasher.
  • Remove the screws from the brackets that anchor the dishwasher to the bottom of the countertop and to adjacent cabinets.
  • Place a drop cloth or piece of cardboard on the floor in front of the appliance to avoid marring the floor.
  • Pull the old dishwasher out and move it from the area.
  • Tape the existing electrical cable to the floor so that it is not disturbed when the new dishwasher is moved into place.

Dishwasher Air Gapwhat It Does

5 Best Portable Dishwashers in 2020

Many local building codes require a dishwasher to connect to an air gap before the connection to a garbage disposer so wastewater doesnt flow back into the appliance. If your local codes require an air gap, youll need to buy it separately. Mount it on top of the sink. Connect one flexible hose to the drain of the dishwasher, and connect the other flexible hose to the trap of the sink or to the disposers dishwasher inlet. If your local codes do not require an air gap, you can shape the drain hose of the dishwasher into a high arc instead.

This video shows what an air gap looks like and where it goes, discusses whether or not you need one, and shows how to clear the air gap if it gets clogged.

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Reconnect The Drain Hose


Remember when you threaded the new drain hose through the opening that leads to the cabinet under the sink? Now, youll attach it. Under your sink, you probably have a sink tailpiece.

Your drain hose will fit onto the branch that comes off the pipe. Use a clamp to securely connect it to the sink tailpipe or the disposal, depending on your preference.

Preparations For Dishwasher Installation

The first step is making sure the machine will fit in the opening. Most standard dishwashers require a 24 opening. If youre installing new cabinets, its important to consider the width of the dishwasher ahead of time. The height of most machines is adjustable within certain limits, but check to be sure the dishwasher you plan on purchasing will fit your opening before buying.

Depending on your cabinet configuration, you may need to drill one or more holes to run supply lines, electrical wiring, and the drainpipe through. Hole saws make quick work of drilling larger diameter holes.

Remove the faceplate at the base of the machine to access the supply line inlet and electrical box. Its a good idea to connect the wiring, drain, and supply lines before pushing the dishwasher into the cabinet, since it makes it easier to access the underside of the machine.

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Setting Up The Cabinet And Utilities

  • 1Evaluate the intended cabinet space for your chosen dishwasher. Built-in dishwashers are typically designed to fit in a standard cabinet width24 in in the U.S.and be placed right beside the sink cabinet. Confirm that your intended installation space suits the requirements for your selected dishwasher otherwise, youll have to make potentially costly adjustments to your cabinetry layout.XResearch source
  • 2Drill holes into the dishwasher side of the sink cabinet, if needed. If you are installing a dishwasher for the first time in your chosen space, youll have to drill 3 holes through the side of the cabinet for the dishwasher’s electric wiring, water inlet, and drain tube. If youre replacing a dishwasher, you can typically reuse the existing holes that lead into the sink cabinet.XResearch source
  • If youre drilling new holes, refer to the new dishwashers manual to pinpoint the location and diameter of the holes. Use a power drill with a hole saw bit to cut the holes.
  • If the electrical wiring for the dishwasher doesnt run into the sink cabinet, youll only need to drill 2 holes.
  • 3Make sure the current is shut off to any electrical wiring for the dishwasher. If youre replacing a dishwasher that youve already removed, check your homes electrical panel to ensure that the line that runs to the dishwasher is not carrying a current. In most modern panels, just flip the appropriately labeled switch to the off position.XResearch source
  • Step : Temporary Hookup

    How to Install a Dishwasher Step by Step – It’s Easy!

    Turn off the water supply to your faucet and drain any remaining water in the line by opening up the faucet. If you have an older home with galvanized pipes, this might be trickier. If thats the case, youll want to open up one of your sink drains and let some water drain out of there first.

    Once the line is drained, remove the sprayer hose from your pull-out faucet by unscrewing the connecting nut. Unscrew the band clamp by turning counter-clockwise. If you have trouble doing this, try pushing inwards on the nut with a screwdriverthis will release some of the tension for you.

    Slide your new dishwasher sprayer hose onto the faucet. Most dishwasher hose kits come with a connecting nut that should fit the existing threaded end of your pull-out sprayer hose, but if it doesnt you can replace it with one from your local hardware store. The new nut should be about half an inch longer than the original was. Make sure to use Teflon tape on all threaded connections to prevent leaks.

    Now connect the other end to your portable dishwasher by securing the clamp band around the sprayer hose and tightening it with a screwdriver, just like you did above. Use Teflon tape here too. We also recommend replacing any plastic washers that might be included with your kit theyre only there to prevent leaks, so if theyre old or cracked, you might want to swap them out.

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    Can You Remain Clean Without A Garbage Disposal

    Of course, however, you will need to deal with the regular upkeep. There are also some advantages.Due to the absence of the garbage disposal, you will get extra space underneath your sink. It also means you will get wastewater treatment facilities and, after composing it, you will have green points.

    Attach The Electric Cord

    Most of the working partsboth the electrical hookups and the plumbing connectionsare located behind an access panel located on the front bottom of the dishwasher. While it is possible to make these connections while you crouch or lie on the floor, most people find it easiest to carefully lay the dishwasher on its back to remove the access panel and make the preliminary connections.

    Start by removing the bottom access panel on the dishwasher. Visually identify the power cord connection fittings, the water inlet solenoid valve, and the drain fitting.

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    Find The Right Dishwasher Parts With Repair Clinic

    Repair Clinic stocks all the appliance parts you need to install, reinstall, maintain, or repair your dishwasher: mounting brackets, water supply lines, drain hoses, leveling legs, water inlet valves, drain pumps, spray arms, dishracks, and much more. Just enter the full model number of your dishwasher in the Repair Clinic search bar to see a complete list of compatible parts. You can use the part category and part title filters to narrow that list down to identify the specific part you want. Repair Clinic stocks parts for all the top brand dishwashers including Bosch, KitchenAid, Kenmore, Maytag, Samsung, GE, Frigidaire, LG, and Whirlpool, but youll want to make sure youre purchasing the exact part that fits your model.

    How To Install A Dishwasher 10 Dishwasher Installation Tips

    Dishwasher Pre

    Wondering how to install a dishwasher? If you know what youre doing, dishwasher installation is usually quite easy. But if this is your first time, its important that you read up thoroughly before you start.

    You could begin by watching this YouTube video: Dishwasher Installation Help: How To Hook Up A Dishwasher. Although it is aimed at the American market, it does cover some dishwasher installation fundamentals such as checking that the water and electricity supplies are switched off, and measuring your cavity to ensure the new model will fit.

    Next, you could visit the the LG website and read their handy written guide: Dishwasher Installation Tips. This article answers the most commonly asked questions, such as What is the water temperature requirement? and What type of tubing can be used for the water inlet hose?

    Appliances Online consulted Sydney plumbing specialist Ed Wharton , who gave us his guide: How To Install A Dishwasher 10 Dishwasher Installation Tips:

    1. Lay a drop sheet or coversheet in kitchen area where proposed working area will be.

    2. Turn off the water to the dishwasher, and then disconnect the old dishwasher in cupboard. Undo cold water hose, electrical lead and unscrew clamp form waste pipe.

    3. Sweep and clean proposed area for the new dishwasher.

    4. Remove new dishwasher from packaging and check that there are no scratches or marks and that there is an owners manual and warranty.

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