How to Install an Instant Hot Water Dispenser

An instant hot water dispenser is the epitome of convenience. It accelerates different kitchen tasks such as preparing soups, hot drinks, sauces, warming baby bottles, and others.

Instant hot water dispensers take the hassle out of many chores that require boiling water.

These appliances dispense near-boiling water and are usually hooked up through the plumbing for easy pouring through the sink.

Did you recently purchase an instant hot water dispenser but still wonder how to go about the installation process? Don’t worry; we’ve got your back.

Installing an Instant Hot Water Dispenser

How to Install an Instant Hot Water Dispenser

The following are helpful instant hot water installation instructions.

  • Turn off the water supply

To begin the installation process, you need to turn off the water supply. After that, unpack the faucet and straighten the copper tubing carefully.

  • Drill a mounting hole

Using a stainless steel bit and a cordless drill, drill a ¾-inch hole into your sink. You can also use a slung buster to cut the hole.

  • Mount the faucet

The next thing you need to do is mount the dispenser faucet. Ensure that the seal sits properly on the unit’s body and that it surrounds your sink’s mounting hole.

  • Tighten the faucet

Now that the faucet is already in place, it’s time you fastened it. Working from under your sink, place the mounting plate on the stud and attach the hex nut. Tighten the nut sufficiently to prevent the faucet from rotating when in use.

  • Mount the dispenser’s hot water tank

For excellent results, mount the hot water tank vertically and in a level location where it’s easy to make plumbing and electrical connections.

Don’t extend electrical or plumbing lines when mounting the tank. If necessary, allow for drainage from under the sink.

Choose a spot under your sink and mount the tank vertically. It should be within easy reach for both electrical and plumbing connections.

Place the tank at least 16” or less of the water lines and 30 inches or less of a grounded outlet.

  • Connect the tubes

And now, it’s time to connect the tubes. Place the connector fitting of the blue tube onto the plastic fitting on the left of your tank. Push it until it clicks perfectly into place.

Slip the white tube over the barbed fitting and connect the clear vinyl tube into the middle fitting.

  • Connect the plumbing

This step involves making tubing connections. Here you’ll find some minor variations depending on the system you’ve purchased.

One thing to note is that when connecting the tubing between components, you need to do it so that it won’t interfere with your cabinet storage area.

Ensure that there are no sharp bends and leave enough length to ease servicing when needed. Once this is done, cut the tubing to lengths of choice and insert them into the connector fittings.

You also need to be careful when cutting copper or plastic tubing by removing all the burrs that might harm the fittings. Insert the tubing into the fittings altogether to avoid future disappointments.

Install the filter and finish the installation

To complete this process successfully, you need to install the head and the unit’s filter bracket.

This should be done carefully to prevent stretching or kinking of the tube when making plumbing connections.

You also need to choose a location that allows for easy replacement of the filter cartridge. Also, don’t mount the filter over any electrical outlet.

Next, mark the locations for the mounting hole and then attach the bracket using the screws provided. Insert the polythene tubing into the filter head’s inlet. Repeat the same process with the filter head’s outlet.

If your dispenser dispenses hot water only, you’ll have to insert its outlet tubing into the connector fitting and the faucet copper tube when installing the filter.

If it’s a hot/cold model, insert the outlet tubing into the quick-connect fitting and the unit’s faucet copper tubing when installing the filter.

After this is done, connect the tube to the compression fitting.

  • Fill the tank

Before plugging the dispenser into the electrical socket, switch on the cold water supply. After this is done, turn the hot tap on to fill the tank.

  • Plug in the tank

Plug in the tank and wait for about 10 to 15 minutes. After this, the water will have reached its target temperature.

Note that some water might drip from the faucet in the first heating cycle, which is quite normal.

  • Adjust the temperature

After 24 hours, it’s time to adjust the temperature of your water. This is because you mustn’t allow the water to boil. Should this happen, water and steam will start dripping from the tap.

You should also know that extended boiling could harm the dispenser.

Frequently Asked Questions

Q. How much should I expect to pay to install an instant hot water dispenser?

The cost of installing an instant hot water dispenser ranges between $200 and $400.The cost depends on the unit you need, whether the sink has to be drilled, how far the water lines will be run, among others.

Q. Can you install a hot water dispenser on your own?

If you’re good at DIY, you can install the unit on your own. However, if you are uncertain of your skills, get a professional plumber to install the unit.

Q. How do you hook up an instant hot water dispenser?

To hook up an instant hot water dispenser, turn off the water supply, install the faucet and unpack the dispenser components.
Then, on a flat surface, straighten the copper tubing. Feed the tubes down the hole in your countertop until the base of the faucet rests on the countertop surface.
Add the mounting plate onto the threaded stud and tighten it. Ensure that the faucet is at the desired angle.
Mount the tank and then connect it to the faucet. Install a T-fitting into the existing cold water supply, connect the copper inlet tubing to the T-fitting, and then turn on the water supply.
You can now open the hot water supply to fill the tank until water flows out through the spout. Plug the cord into an electrical outlet to begin heating the water.

Q. What’s an instant hot water dispenser?

An instant hot water dispenser heats water and dispenses it through a hot water faucet when you want it.

Q. How does an instant hot water dispenser work?

Hot water dispensers have a thermally insulated tank with a heater. The heater is thermostatically controlled to maintain the water temperature depending on how you set the unit’s thermostat.

Q. Are instant hot water taps energy-efficient?

Although instant hot water dispensers use energy, they have a thermostatically controlled heater to maintain temperature.
It is not constantly heating and only uses energy to raise the temperature slightly.

Q. What makes the best instant hot water dispenser?

The best instant hot water dispenser should be easy to install and use. It should also be energy-efficient.

Q. Is a hot water dispenser quicker than a kettle?

Heating a cup of water in a hot water dispenser or a kettle takes the same amount of time and electricity.

Q. Are instant hot water dispensers safe to use?

Yes, instant hot water dispensers are made with safe materials hence 100% safe for you to use.

Q. Which hot water dispenser is better, with a tank or tankless?

A tankless hot water dispenser is better than one with the tank as it saves more energy and boasts lower operating costs.


An instant hot water dispenser comes in handy for dishwashing and preparing hot drinks. It not only saves you time but also effort and money on electricity bills.

These dispensers come with hose connections and faucets to supply the hot water to your sink for ease of use.

From our guide, we believe that you now have an idea of how you can mount the dispenser you recently bought with ease. If you still can’t hack it, get a plumber to complete the installation for you.

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