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How to install an electric water heater in 4 steps?

If you want to start enjoying hot water in your home, you should be thinking about installing an electric water heater. It is the point that can generate more problems when we seek to have domestic hot water (DHW).

At Green Planet Plumbing we are experts in all the plumbing tasks your home needs. For this reason, today we are going to explain to you through very simple instructions how to install an electric water heater.

electric water heater installation

In case you need to have hot water urgently, we recommend that you hire a professional. It may take an expert about an afternoon to install an electric water heater. Otherwise, a person who does not have much knowledge of the subject can take up to 3 days.

If you have the basic knowledge, follow these steps to install the electric water heater and enjoy its advantages:

Steps to install an electrical hot-water heater in your home

Close the stopcock to install the thermos

Before beginning to install an electrical hot-water heater, you need to close the water stopcocks that connect with the place where you're planning to place your heater. In case you do not have segmented stopcocks, which is the most recommended, you should close the general water shutoff valve in your home.

If you have not chosen where you are going to install your electric water heater, you can do so in the kitchen or bathroom. You should check that where you are going to install the electric water heater there is a grounded plug and close to the water outlet. The hot and cold water connection should be as close to the thermos as possible.

When you choose the place, you should also keep in mind that you should hang your thermos. Therefore, you need a wall that supports the weight. If you have a 50 liter, 30 liter or 15-liter electric water heater, most of the walls will do.

The most recommended thing is that before buying the thermos you already have chosen the place where you are going to install it. This way, it will be easier to decide whether to buy a horizontal electric water heater or a vertical electric water heater.

Make the drills you need to install your electric water heater

Before making the holes, you must measure the distance between the anchor legs horizontally and vertically. In this way you will mark on the wall where the screws should go.

Once you are sure where to drill the hole, you can start drilling and plugging in. These must be at least 10mm and must be accompanied with their respective nuts and washers. For safety and regardless of how the wall is, we recommend installing with chemical plugs, and especially when it comes to thermos from 50 liters’ capacity.

Remember to see with the extent that the holes are straight. In this way, you will have the assurance that your electric water heater will not have inclinations to either side.

Hang your electric water heater

To hang your thermos of hot and cold water, we recommend that you seek help. It is not a difficult task but these devices are usually very heavy and thus, having an assistance is good to avoid accidents. Next, you need to screw the locknuts onto the shank of the anchor rod.

electric water heater

Connect the water to your electric water heater

Place the two anti-electrolytic handles on the hot and cold water thread at the bottom of the thermos. Then you'll screw the protection valve into the cold water inlet. In this way, you'll protect it against excess pressure.

We recommend that you wrap Teflon tape or hemp thread around the threads to seal them to prevent leaks.

Then, you need to screw the reinforced hoses to the protection valve of the cold water inlet and to the electrolytic that's within the hot water outlet. Finally, you will screw the hoses to the square keys of the thermos.

At this point you have finished installing your electric water heater. However, you must check its correct operation and check that there are no leaks. Before doing this you must remove any air that may have entered the installation.

How do I remove the air from the circuit of my water installation heater?

Before testing your horizontal or vertical electric water heater installation, you must eliminate any air that may have been filtered. To purge it, you must open the cold water inlet tap and then open any hot water tap so that, as the thermos fills, it will expel the air.

Once you have efficiently eliminated the air, you can start your thermos without problems.

When to change an electric water heater for another?

Has your electric water heater been damaged or did you decide to change it because it did not meet the basic needs of your home? If so, you should keep in mind to install an electric water heater. However, this task requires a lot of care and some basic knowledge to keep everything working perfectly.

If this is your case, the first thing you should do is disassemble your old electric water heater or water heater. To do this, you must close the water stopcock to which it is connected or the general cut-off of your home.

Afterwards, you must empty the thermos completely. This is very easy to do. First, you have to close the cold water inlet angle valves and the hot water outlet valve. The next step is to disconnect the hoses from the thermos. Finally, you connect a hose to the hot water outlet of the thermos, remove the safety valve and by gravity, the thermos empties itself.

electric water heater installation

When you have already lowered your water heater, you can start from step 3 to install the new electric water heater if you have not thought of moving it.

Remember that the most advisable thing to install your electric water heater is that you hire experts and with experience in this task. This will guarantee that everything works perfectly, and that your water heater will not suffer damage due to a bad installation, you will avoid accidents and you will not spend too much time having an electric water heater working in your home.

If you plan to install an electric water heater, please contact us. We will help you solve all your problems and do any type of plumbing installations.


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