How To Connect A Dishwasher To The Water Supply
People often get confused about how to connect a dishwasher to a water supply after buying a dishwasher for the first time.
Knowing how to connect a dishwasher properly is absolutely necessary to not go wrong in any way on the get-go.
Read this article thoroughly to understand how to properly connect your newly purchased Dishwasher.
When Do You Need To Change The Dishwasher Supply Line
As mentioned above, the comfort of using a dishwasher can turn into a disaster if an issue arises with the water supply line. You may have to replace the dishwasher supply line in case any of the following happens:
Less or no water reaches the dishwasher — If there is no water in the dishwasher, then you need to check if the water inlet hose is properly connected and the valve should be in the open position. In case it was not properly connected or in a closed position, then fixing that would solve the problem. If there is less water, then you need to check the leaks and fix them. If nothing works, then you need to change the water supply line.
Frozen pipeline — Another reason for your dishwasher not filling up with water may be that the water supply line could be frozen. It is a pretty serious problem as the supply line may burst at any time. Then you would definitely have to replace the supply line.
Water under the dishwasher — if the water starts filling up under the dishwasher, you need to check the water supply, check every connection to tighten and secure it. If the problem persists, then the cause may be a hole in the pipeline that should be fixed immediately as it may result in extensive water damage.
How To Connect The Dishwasher To The Water Supply
Though installing a dishwasher might seem very tricky if you are doing it for the first time, you can still connect your Dishwasher to your article by following this article.
Theres no way to go wrong with connecting the Dishwasher to the water supply.
However, it is also recommended to look at the user manual provided with that specific model.
The Dishwasher installation mostly has three significant steps: Power connection, water supply connection, and connecting the drain hose.
Before you connect your Dishwasher to the water supply, first you need to know what are the things you need to connect your Dishwasher to the water supply. They are:
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What Does It Mean When My Blomberg Dishwasher Has An E01 Error Code
Blomberg dishwashers are known for being reliable and easy to use. Like any other brand, however, errors can occur from time to time. One of the most common errors that can occur is the E01 error code. The first step to treating the problem is understanding what this code means. This will help you take the necessary steps to determine the source and reason behind this error. Do keep in mind that some minor or basic problems can be diagnosed and even resolved without calling a technician. When parts need to be replaced or the appliance needs to be opened up in order to locate the source of the problem, it is best to contact a trained and experienced technician.
How To Install And Connect A New Dishwasher

Aaron Stickley is a licensed plumber with 15 years of experience in commercial, new residential plumbing, and residential service and repair. He started his own residential service and repair plumbing business. Aaron’s articles about plumbing on The Spruce span four years.
The Spruce / Kevin Norris
- Working Time: 2 – 3 hrs
- Total Time: 2 – 3 hrs
- Skill Level: Intermediate
- Estimated Cost: $20 to $40
When you buy a new dishwasher from a specialty outlet, the price often includes the delivery team making the hookups, and it may even include hauling away the old dishwasher. But if you buy the dishwasher from a big-box home improvement center or an online retailer, connecting the dishwasher is usually not includedor it may cost you a substantial additional fee to have this done.
Fortunately, connecting the dishwasher yourself is a fairly easy job, once the old dishwasher has been removed.
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Insert Water Supply Line
Gently insert the water supply line in the standard 3/8 inch compression fitting as deep as it can go to ensure that there is no leakage. At the same time, ensure that the 3/4 inch hose faces upwards. Gently insert the rubber washer on the 3/4 inch hose fitting. Please do not use Teflon tape because it may loosen the compression fitting, causing leakage. Tighten the nut and ferrule by gently moving it in a clockwise direction until it fits tightly into the 3/8 inch compression threads. Use an adjustable wrench to fit the nut tightly. Remember that copper tubing kinks and bend easily. Therefore, when tightening the nut, you need to be as gentle as possible.
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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What Size Is The Dishwasher Hose
The Dishwasher Drain Hoses Dimensions The majority of dishwashing drain pipes are 12 inches in diameter. It is necessary to attach the rubber boot dishwasher drain hoses in order to allow for a variety of connectors at the hoses other end. This enables them to connect to 12-inch, 34-inch, and 1-inch connectors, respectively.
Check Your Water Supply
Even if the water supply is perfectly in order before you turn your dishwasher on, the supply could be interrupted without you even realising it. This is why you should check the water supply to your property before you do anything else. If the water supply has been temporarily cut off , this could mean that there is absolutely nothing wrong with your dishwasher. All you will need to do is wait for the water to come back on. You can also check the tap to which the dishwasher is connected and make sure that it has not been accidentally or unintentionally closed. If you are without water for several hours, you might want to run the entire wash cycle from the beginning since the soap and other residue may have hardened on the dishes and this calls for a more thorough clean.
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What Size Is Dishwasher Drain Hose
The dishwasher drain hose is connected directly to the waste disposal line. Although some people prefer connecting to the gutter, it is not advisable to do so because it is likely to block regularly due to the food remains.
The standard size for a dishwasher drain hose is ½ inches. It has differently sized rubber boots on one end to allow several types of connections. As a result, most dishwasher drain hoses can connect ½-inch, ¾ inch, and 1-inch connections.
Since a highly long drain hose is prone to twisting, preventing the correct water flow, installing an extremely long pipe is not advisable. If the pipe is too long, you will have to cut it.
The standard drain hose length in most homes is 7/8 inches. To determine if the length is okay, you must attach the pipe first on both ends using a hose clamp. Afterwards, check for any twists, untwist them and cut the excess length to prevent blockage.
Nonetheless, drain hoses are prone to clogging even though you got the proper sizing. However, it is not something to cause an alarm because unclogging is relatively easy if there are no twists.
To unclog it, first, remove the utensils from the ranks. Next, switch off the electricity and eliminate the water using a towel.
How To Install Hammer Arrestors In A Dishwasher
The harmer arrestor works by absorbing the pressure and shocks caused by plumbing fixtures.
It can be installed vertically or horizontally. Strictly, it should be installed 6 feet next to the valve causing the noise.
Step 1: Shut off the water supply
While installing the water hammer arrestor, you will have to disconnect the waterline. Thus, to avoid causing messes, it would be wise to shut off the main water supply into the house
Step 2: Drain the pipes
Before you shut off the main water supply, there was already some water flowing in the pipes. Thus, you should drain this water to prevent it from spilling to the ground.
Turn on the sink tap and wait until all the water has drained.
Step 3: Disconnect the supply line from the valve
Next, you need to disconnect the supply line of the valve that is causing the noise. Note that the harmer arrestor should be installed at a proximity of 600 feet to absorb the shocks caused by the valve efficiently
Step 4: Reconnect the supply line to the harmer arrestor
Install the water hammer arrestor at the point where you disconnected the supply line. You are free to install the water harmer arrestor depending on the orientation of the supply line.
Step 5: Use a wrench to tighten
Afterwards, use a wrench to tighten the harmer arrestor at 45 degrees. Rotate the harmer arrestor until it is tight to prevent leakages.
Do the same with the other opening of the arrestor.
Step 6: Turn on the water supply
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Remove The Wire Connector Housings Cover
Attach the green wire from the appliance cable to the green grounding screw, the white neutral wire to the white dishwasher lead, and the black hot wire to the black Dishwasher lead.
Twist-on wire connectors are commonly used to make these connections. However, other dishwashers may use a different approach. Replace the wire connection housing cover.
Do All Dishwashers Need Installation Kits

Generally, all dishwashers need installation kits, but this may not be true for all. This is because the new Bosch dishwashers being produced all come with a preconnected inlet hose, a power cord, and even a to make installing your dishwasher so much easier.
We know that most dishwashers are hardwired and do not come with power cords. To change it to a plug-in, you would need to get a power cord kit.
But this is not the case with the new Bosch dishwashers, the power cords come with them. Inlet hoses do not need to be bought too, which makes them a great deal.
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Dishwasher Supply Line Connector Hose
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Choose from Dancos range of braided stainless-steel flex water supply lines and dishwasher connector hose units, all designed to help fix and solve your dishwasher supply connection issues. Dishwasher hose connector fittings from Danco come in variable lengths and sizes to match different types and brands of dishwashers and ensure a secure water supply line to your appliance. These dishwasher supply lines are made from highly resistant materials to ensure lasting service life.
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Connect The Water Supply Tube
Connect the end of the water supply tube to the water supply shut-off valve under the kitchen sink.
Turn on the shutoff valve and check for leaks. Also look under the dishwasher to check for leaks at the other end of the supply tube, where it connects to the dishwasher 90 fitting. If you notice leaks at either location, gently tighten the fittings a little more.
The Spruce / Kevin Norris
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How To Install A Dishwasher Supply Line
Installing some appliances can seem like a daunting task if you dont take care of some important details. For example, the installation of a dishwasher cannot take place unless there is an extension of the hot water supply line to the dishwasher and a connection of the drainpipe to the dishwasher. For an already installed dishwasher, replacement of the supply line is also a tad difficult if you dont know what youre up against.
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Do Dishwashers Come With A Water Supply Line
New dishwashers can be difficult to install if all the necessary tools and materials are not available. Before buying a dishwasher you should know what materials come with it, and the ones you need to buy before it can be successfully installed. This helps you to be adequately prepared.
And since you know water supply lines are one of the most important tools for a successful dishwasher installation you are probably wondering if they come with dishwashers or if you need to get them separately.
We will be answering this question and other related ones that may be bothering your mind in detail, in this article. We will also explain all the connections that a dishwasher needs to run effectively and their functions.
Do Dishwashers Require A Water Hammer Arrestor
The dishwasher water line has water valves that prevent the backward flow of water. However, when the water flowing in the system suddenly stops, it is likely to cause the valves to close unexpectedly, resulting in shock.
As you might be aware, shock is not suitable for the dishwasher. In search of the solution, introduces us to a water hammer arrestor.
A hammer arrestor is a device that absorbs sudden pressure that results from the sudden closing of water due to a stop in water flow. As a result, this device prevents potential damages.
Consequently, a water hammer arrestor is quite crucial in a dishwasher machine. It will absorb the valve shocks only, but it will also help prolong the devices lifespan.
However, some dishwasher models do not have the hammer arrestor installed. Besides, even if your device has it, it may need a replacement after three years. Thus, you must learn how to install a water hammer arrestor.
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Dishwasher Water Supply Line Hot Or Cold
It depends on the manufacturer and the model of the dishwasher but most dishwashers, especially in the US are designed to be connected to a hot water supply line. This is especially true for under-counter built-in dishwashers.
Never be tempted to connect your dishwasher to a cold water source as this will not produce the result you desire. The hot water cuts through grease and removes stuck foods on the dishes more efficiently. It also helps to sanitize the dishes.
We know that most dishwashers come with internal heating elements that heat the water that comes into the dishwashers before washing the dishes, but this doesnt mean you should connect your dishwasher to the cold water supply line.
The heating element in your dishwasher is supposed to heat the incoming hot water until it gets to the temperature the dishwasher requires to wash your dishes efficiently.
If it is cold water that comes into your dishwasher, the heating element will work longer and harder to get this done which will weary it faster. It will also take time.
Old dishwashers dont even have heating elements, so nothing heats the water once it gets into them. You cant avoid connecting them to hot water supply lines unless you want to deal with dishes that arent well cleaned.
Before connecting your dishwasher to a hot water supply line, however, ensure the manual doesnt say different.
Do Dishwashers Come With Water Supply Line

Water supply: A dishwasher requires hot water to function properly. a hose to connect the dishwasher to the drain under the sink: The dishwasher will be delivered with a hose that will be used to connect the dishwasher to the sink drain. Most of the time, the hose is linked to a water supply in the waste disposal. Simple plumbing is required due to the lack of a toilet and the fact that you do not wish to have one.
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What Size Is Dishwasher Waste Pipe
The waste pipe is connected to the drain pipe. As its name suggests, it carries the waste to the draining area. Thus, besides its size, you must ensure that it is robust, especially to rust.
On its size, the most recommendable diameter is ¾ inches. However, you should highly consider the pipe you are connecting with.
Additionally, you should also check the length of the waste pipe. Ideally, it should be long enough to reach the septic tank or the drainage area.