After a long procedure for selecting the appropriate model, the crucial moment of installing the water heater and connecting it to the electrical network comes. If you don’t know how to install a storage electric boiler, it is better to contact a specialist. The service will cost around $100. If an old electrical appliance is installed in the house and it needs to be replaced, you will have to pay additionally for dismantling. Those who want to save their home budget can use the instructions on how to install and connect a water heater without outside help in a couple of hours.

If you decide to install the boiler yourself, then you need to clearly know how to do it. Mistakes made during installation will lead to burnt out wiring, flooding of the home, and failure of the device. Let's consider the basic rules for installing a water heater:

  • First you need to choose the optimal location of the device. The boiler is usually installed in the bathroom, toilet or kitchen. Electrical appliances are provided with free access.
  • The wall or any other support for the boiler must withstand double the weight, for example, with a capacity of 80 liters, the load indicator is 160 kg.
  • Old wiring must be replaced, otherwise it simply will not withstand the load.
  • The wiring of ten-year-old metal pipes will similarly have to be changed.

Other rules and installation nuances will be specified in the installation instructions.

Tools and materials required for installation

When you plan to install a water heater yourself, you cannot do without tools. It doesn't matter what brand the boiler is. Let it be “Termex”, “Electrolux” or “Ariston”. The installation principle of storage water heaters is the same.

You will need the following tool:

  • adjustable wrench and set of wrenches;
  • impact drill or hammer drill;
  • straight and shaped screwdriver;
  • pliers;
  • roulette;
  • level.

You will need the following materials:

  • flax or fum tape for packing threaded connections;
  • Ball Valves;
  • connecting tees;
  • two flexible hoses or a plastic pipe for connection to the water heater pipes.

If the installation of the boiler cannot be done without replacing the wiring, you will need a cable, an RCD, a socket, and a 16 A circuit breaker.

Choosing the best place to install a water heater

The choice of installation location for the water heater depends on the type of device. Storage boilers come in floor-mounted, wall-mounted and built-in models. The name already makes it clear where to install them:

  • Floor-standing storage water heaters are designed for large volumes of water and are most often used in large country houses. Floor-standing boilers are installed on a stand.
  • The volume of the built-in type device is small. Such water heaters are placed under the sink or in a specially designated niche.
  • For an apartment, it is optimal to install a vertical or horizontal wall-mounted water heater. The device does not take up useful floor space, and the volume of hot water is enough for a kitchen sink and bathing.

A water heater of any type is located as close to the water supply points as possible. The air temperature in the room must be above zero, otherwise the water will quickly cool down, and if there is a power outage, the liquid will turn into ice.

The installation height of the boiler on the wall does not play a special role if it is connected to a central water supply. Choose a convenient location that is easily accessible for service. In the case of autonomous water supply, the height of mounting the water heater on the wall depends on the location of the water storage tank.

Features of wall mounting

Wall-mounted water heaters are the most common and their installation is worth considering in more detail. The devices are secured to the wall with metal brackets. For vertical models, two fasteners are used, and a horizontal boiler is fixed with four elements. The device is supplied with the manufacturer's instructions, which outline all the installation details.

When installing a horizontal water heater, fasteners with loops are used. Storage heaters cannot be installed in the reverse order, that is, horizontal models in a vertical position and vice versa. Incorrect placement will lead to damage to the device, as well as flooding of the room.

The mounting brackets are screwed into the drilled holes, having driven in plastic dowels first. A water boiler is heavy and can only be supported by a strong wall made of concrete, brick, cinder block or wood. Installation on plasterboard partitions is prohibited. An exception is a plasterboard wall, behind which there is a load-bearing structure. For fastening, elongated brackets are used that can pass through plaster and sink into durable material.

Connecting the boiler to the water supply system

Once the installation of the boiler to the wall is completed, the important process of connecting to the water supply begins. It is important to consider the type of water supply here. There is a diagram for connecting a water heater to a central water supply and an autonomous system. To obtain hot water from the tap immediately after opening it, recirculation is provided. In this option, the boiler piping is performed according to a special scheme.

Connection to water supply

First, let's look at how to connect a storage water heater to a centralized water supply, since this option is most common for apartments. The system always has a water pressure of at least two atmospheres, which allows the owner to mount the device to the wall at any height and this will not affect the operation of the boiler.

The boiler is connected to the water supply using flexible hoses or a plastic pipe, but first a security group is assembled. The unit consists of a set of tees, valves, taps and fittings. The cold water and hot water pipes of the device protrude from the bottom of the housing. This is where they begin connecting the water heater to the centralized water supply:

  • A detachable adapter made of two nuts is screwed onto the thread of the cold water inlet pipe. The plumbing fitting is called “American”.
  • A tee is screwed onto the thread of the adapter. A check valve is installed at the bottom outlet. There is an arrow on its body indicating the direction of the water, and it should be facing up. The valve allows liquid to enter the tank, but does not allow water to flow back into the pipeline.
  • Another tee is connected to the side outlet of the tee. The side hole of this element is directed downwards and a compression fitting is screwed on, and a piece of plastic pipe diverted into the sewer is attached to it. Excess water will be drained through the pipe under excess pressure.
  • Place the second tee on the free exit.
  • A cold water supply tap is connected to the inlet of the check valve.

To simplify the diagram, the safety unit can be replaced with one element that has a check and safety valve inside the housing, as well as a spout for draining water. The part is immediately screwed onto the American one, and a cold water tap is placed behind it.

An “American” is screwed onto the second pipe of the water heater, intended for the outlet of hot water, and a tap is installed. It is reasonable to place a tee between these two elements and screw another tap to the side outlet. Shut-off valves are useful for supplying air to the tank when draining water from the boiler. If the manufacturer has provided an air supply plug, an additional tap is not needed.

After installing the safety group, as well as shut-off valves, they begin to work on the cold and hot water pipelines. To connect to the system, it is optimal to choose plastic pipes. Pieces of the required length are connected to the taps on the water heater using compression fittings. The second end of the pipes is connected to tees embedded in the water supply system.

The correct boiler piping scheme involves inserting two more taps that disconnect the apartment pipeline for hot water supply and hot water supply from the common risers of the residential building. While the water heater is operating, the cold water tap will be constantly open. The shut-off valves near the hot water riser are moved to the closed position. If this tap is not closed, hot water from the boiler will flow through the riser to neighboring apartments.

Connection to an autonomous water supply system

In an autonomous water supply system, the boiler connection diagram is of two types, which depends on the location of the storage tank. The tank in a private house is located in the attic or inside one of the rooms on the second floor.

To know which scheme to choose, measure the distance between the bottom of the storage tank and the water heater mounted on the wall. If the indicator is less than 2 m, then the tee connecting the branch of the cold water pipeline is placed above the boiler level. The safety group is mounted on the device pipe.

When the distance between the storage tank and the device is more than 2 m, the branch tee of the cold water pipeline is placed below the level of the water heater. The safety group is screwed onto the inlet pipe.

Any of the considered schemes can be supplemented with a reduction gearbox. The unit is designed to reduce water pressure in the pipeline if the indicator exceeds 6 Bar.

Connection diagram with recirculation

When installing an indirect heating storage water heater for a private house, a scheme is used where recirculation is provided. The system allows you to receive hot water from the mixer immediately after opening the tap.

The system is a closed loop. This is usually done through a heated towel rail. In the absence of this element, blunt recirculation is allowed. Instead of a heated towel rail, a flat pipe is used. The main thing in the scheme is to close the ring. A circulation pump circulates hot water in a circle. The system has an expansion tank, as well as three valves: non-return, safety and air bleed.

Recirculation constantly keeps the water hot, even if a person does not use the device for a long time.

Electrical connection

To connect the boiler to the electrical network, you will need an electrical diagram and an accurate calculation of the wire cross-section. Any cable will not work. When making calculations, it is necessary to take into account the power of the heating element, and take a wire with a small margin of cross-section. Typically, household models are equipped with heating elements with a power of 1–3 kW. Connecting such a water heater to the electrical network is done with a three-core copper wire with a cross section of 2.5 mm 2. To make cable selection easier, use the installation table.

In the electrical circuit for installing a water heater, there are three important components: an RCD, an automatic circuit breaker, and a socket with a plug. All elements are designed for a rated current of 16 A. Regardless of the presence of a circuit breaker, connection through an outlet is required. For safety reasons, during repairs of electrical equipment there must be a visible break in the electrical circuit.

Let's take a closer look at how to connect a boiler to electricity without turning to a specialist for help:

  • A socket with a protection class of at least IP44 and an RCD are installed on the wall. To get to the contacts of the water heater, remove the decorative cover from below. The distance from the boiler to the outlet is measured to calculate the cable length.
  • According to the measurement, a piece of three-core wire is cut off with a small margin. A chain is assembled from a plug, an RCD, and the last connection is made at the contacts of the water heater. When connecting, it is important not to confuse the third wire - grounding. It is usually marked with yellow stripes on a green background.
  • A three-core cable is laid from the outlet to the circuit breaker, and from it a line is led to the electrical panel.

Even before the boiler is connected to the network, the resistance of the ground loop is measured. The optimal value is within 4 ohms. If the question arises whether it is possible to connect a boiler without grounding, it is better to discard the bad thought. This is personal safety. Grounding protects a person from electric shock during a breakdown of the heating element and the metal parts of the device from destruction by stray currents.

Some craftsmen adapt to turn off the heater from the outlet while swimming if there is no grounding. This is a good option, but you will have to do this every time you wash your hands or dishes, which is extremely inconvenient.

Turning on and checking the boiler after installation

Upon completion of the installation and connection of the water heater, the last question remains - how to check the device for operation:

  • after the risers, close the hot water tap and open the cold water tap;
  • at the boiler inlet, open the shut-off valves and the hot water tap of the mixer;
  • under pressure, water will fill the tank, displacing air from the system through an open mixer;
  • when the water pressure flows continuously without air pops, close the mixer tap.

The device is under pressure. All that remains is to check all joints for leaks.

After successful filling with water, voltage is applied to the water heating device and the desired operating mode is set. The heating time depends on the power of the heating element and the capacity of the tank. If after about 1 hour hot water appears from the mixer, the installation has been carried out correctly.

To safely install and connect the boiler yourself, you need to use all the necessary protective and regulatory equipment, and choose the right method of insertion into the existing water supply system.

Any more or less technically educated person can easily connect a storage water heater on their own.

It is enough just to adhere to the general principles of connection and technological nuances associated with the type of main cold water pipeline and the features of the internal electrical network.

Otherwise, quite expensive water heating equipment may fail, water leaks may occur, or a person may be electrocuted.

In most cases, owners try to place a storage water heater directly in the bathroom or toilet room under the ceiling with wall mounting.

This is quite justified - in this way, space is saved in small bathrooms, since a boiler suspended from the ceiling usually does not interfere with anything or anyone.

But such placement of plumbing equipment is not without some disadvantages:

  • Firstly, in case of cold water shutdown for inexperienced users(mainly housewives) there is a desire to take advantage of the reserves of the valuable liquid contained in the storage tank. At the same time, they often forget to turn off the power supply. A Most of the most inexpensive water heaters are not equipped with protection against turning on without water.(or the latter may simply fail and not work), which will at least lead to breakdown of the tubular electric heater.
  • In this regard more profitable floor installation of water heating storage equipment– as, for example, this is practiced in kitchens, where boilers are mainly installed under the sink. And according to the laws of communicating vessels and gravity, water in the absence of pressure in the system cannot flow through a tap located above the level of the container.
  • Secondly, for wall mounting such heavy equipment(the mass of the boiler is on average equal to the mass of water + 20-40%) Reliable fastening is required.

Not every wall material can provide high-quality fastening. For example, the now so popular plasterboard walls are not even considered. In order to securely fasten a boiler in them (even if it is not the most voluminous one), it is necessary to provide strong metal profiles - mortgages for future fasteners - at the stage of constructing plasterboard partitions.

  • Fastening in concrete or brick walls using metal anchor dowels will turn out to be of sufficient quality. Plastic dowels are strictly not recommended, because after several years they significantly decrease in volume and dry out, which can lead to the fall of expensive plumbing equipment.

Water supply connection diagram

The most reliable, time-tested diagram for connecting a storage-type electric water heater to the water supply network is indicated in the following figure:

When connecting water heating electrical equipment to the water supply network, it is important to observe the following principles:


Connecting a boiler with your own hands to various types of plumbing systems

Steel pipes

In the case of a classic steel water supply, a modern connection method can be used, which eliminates complex processes such as welding, cutting a water pipe and then cutting a thread to connect a tee.

For these purposes, the easiest way is to use a “vampire” tee, which is a modification of a metal clamp, one of which has a pipe with a finished thread.

It is installed as follows:

  • the installation site is first cleaned of dirt and old paint;
  • the clamp is installed using a rubber gasket and securely fixed with four bolts;
  • the water supply valve is closed, if necessary, the pressure in the system is relieved by opening any mixer;
  • using a drill, carefully drill a hole in the pipe through the threaded pipe;
  • The ball valve is screwed on, after which you can proceed to subsequent operations - installation of connecting pipes and safety elements.

To insert into a steel water supply, you will need the following equipment and materials:

  • Vampire tee- 2 pieces;
  • Drill with metal drill diameter 10-12 millimeters;
  • Set of wrenches or pliers and an adjustable wrench;
  • Rubber gasket, FUM – tape.

Video about how not to install small-volume water heaters:

Metal-plastic pipes

Inserting into a metal-plastic pipeline is even easier, since it is done using standard crimp-type fittings.

To do this you need:

  • Mark the insertion points of T-branches on the hot and cold branches of the water supply system.
  • Having closed the inlet valves and relieved the pressure in the system, carefully cut out the marked areas using a hacksaw or grinder.
  • Clean the joints.
  • Install the tees and carefully crimp them using a special crimping press.

To carry out the operation of inserting into the existing one you will need:

  • Two T-branches for metal-plastic;
  • Cutting tool (hacksaw or grinder);
  • Cleaning tool (round file or mounting knife);
  • Crimping press for metal-plastic pipes.
  • Polypropylene pipelines are connected using the soldering method. Therefore, to make an insert into a water supply system from this material you will need:
  • Soldering iron for polypropylene pipes;
  • Pipe cutter;
  • Two tees for propylene pipes.

Detailed video instructions on how to properly connect the boiler to the water supply:

Polypropylene pipes

The operation itself of inserting into a polypropylene water supply looks like this:

  • We shut off the water at the entrance to the system.
  • Mark the cut areas according to the sizes of the tees and carefully cut them out using a pipe cutter.
  • Clean the joints, insert the T-taps, and secure them by heating with a soldering iron.
  • Install valves or extension polypropylene tubes.

To make a threaded connection with shut-off/safety valves, it is necessary to solder special MPH couplings at the ends of the tubes.

Polyethylene pipes

Connection to a water supply system made of polyethylene pipes is possible in three ways:

  • Soldering method. In this case, the same tools are used as when inserting into polypropylene pipelines, only fittings are used from HDPE.
  • Using compression type tees, that is, equipped with conical washers that tighten the connection by turning the nut - collet.
  • By using a vampire tee, similar to that described in the “Steel Pipes” section, only made of high-strength polypropylene.

How to connect the boiler to the electrical network?

An important factor that directly affects the uninterrupted and safe operation of the boiler and the ease of its operation is its correct connection to the electrical network.

To ensure the above, the following conditions must be met:

  • The connection is made through a separate current machine of the appropriate rating. This circuit breaker can be located either in a common panel or in a separate one, located in close proximity to the water heater.
  • Also, according to modern standards of PUE and SNiPs, it is necessary to connect any power electrical appliances, the category of which includes a water heater, through a differential relay (in other words, a residual current device). Typically, an RCD is installed on the entire power wiring of an apartment or floor of a private house.
  • To connect the storage water heater to electricity, you must use a double-insulated cable of the appropriate cross-section.

Thus, self-installation and connection of water-heating plumbing equipment is within the capabilities of almost everyone. If you are not confident in your strengths, abilities, or you do not have enough free time, you can turn to the services of professional plumbers.

Connection cost

Standard installation, if you have all the necessary consumables and fittings purchased in advance, depending on the volume of the boiler, will cost 2000-3000 rubles.

And if there are some difficulties that prevent the quick installation/connection of the heater (for example, a significant distance from the point of connection to the water supply system or the point of connection to the electrical network), then the final amount is negotiated separately.

A boiler is a device that provides heating of tap water in an apartment. It is used quite often, as it is easy to use, effective and absolutely safe for humans. To start using hot water, you need to connect the boiler correctly. This procedure is complex, but if you follow the instructions, you can do it yourself.

Operating a boiler is not as difficult as connecting it

General information

Before connecting the boiler to the water supply in the apartment, it is necessary to study its structure in detail. There are many models on the market, you can choose the option for a specific case.

Water heater device

To properly connect a water heater to a water supply, you need to know what it consists of. Each of its parts performs one or another function that ensures the normal operation of the entire device.

The water heater consists of the following main parts:

  1. Water taps. Thanks to these simple details, it becomes possible to freely open or close the flow of water into the tank of the device. In addition, they are used to drain the remaining liquid. The taps should always be kept open when the boiler is operating, and closed when the device is not in use.
  2. Inlet taps. They are installed on the water supply system through which water flows to the consumer. With their help, you can shut off the water supply to the apartment, which is very important in the event of an emergency.

The boiler will help create comfortable conditions in your home
  1. Check valve. This is one of the most important elements of the system, which is used to protect the heating element of an electric water heater from excessive temperatures. This is especially important when the cold water supply to the tank has been turned off.
  2. Drain valve. This special tap is designed to empty the electric boiler tank. They are used only if there is a need to disassemble the device. Thanks to the valve, all the water in the tank can be safely drained into the sewer, which will prevent it from leaking out and flooding the neighbors. During installation, it is necessary to install the drain valve above the check valve. Otherwise, it will be impossible to get rid of the water in the tank.
  3. Heating elements. These design parts provide heating for the cold liquid that enters the boiler tank. As a rule, they are very powerful, so before purchasing a water heater you should consider the capabilities of the wiring installed in the apartment.
  4. Safety device. It is not included in the package of every device, so it is better to give preference to those boilers that have this component. The device will help turn off water heating in the event of an emergency.

In this video we will look at installing a water heater:

Popular types

The connection diagram of the water heater to the water supply provides for the use of only those devices that are ideal for the room. To make it easier for consumers to choose, all devices were divided into types according to different criteria.

Based on the type of energy used, the following are distinguished:

  1. Gas. Such a device is considered the most profitable from an economic point of view. It is not recommended to install it yourself, since all work related to gas should be entrusted to qualified specialists who have the appropriate official permit.
  2. Electrical. This option is more expensive, but less complicated. The installation of such a boiler can be completed in the shortest possible time and without the involvement of professionals. Because of this feature, electric water heaters are especially popular among consumers.
  3. Wood-burning (“Titans”). They are used extremely rarely, as they require large expenses for the purchase of solid fuel.


In addition, water heating devices are divided according to their operating principle. Among them are the following:

  1. Cumulative. These boilers take up quite a lot of space in the room, as they are of impressive size. Their voluminous tank is very convenient not only for a city apartment, but also for a summer cottage. The connection diagram for a storage water heater to a water supply system involves the use of a low-power heating element. Because of this, energy costs are significantly reduced, but the water heating time increases. The latter indicator depends not only on the power of the heating element, but also on the volume of the tank. Some modern devices are equipped with automatic control of liquid temperature. When it cools below the set value, the heating is turned on again and the selected temperature is maintained. The design is ideal for rooms where a large number of people live.
  2. Flow-through. The main advantage of this water heater is the possibility of constant access to heated liquid. This model will not take up much free space, which is very important when installing the device in small rooms. In addition, the device heats water almost instantly. Among the disadvantages, we can only highlight the presence of restrictions on heating temperature and high energy costs.

Self-installation

There are several options for connecting a water heater to the water supply in an apartment. The installation scheme can be chosen arbitrarily based on the available materials and the availability of free space.

To simplify the work of connecting an electric water heater as much as possible, you need to first prepare all the necessary materials and tools. Not only the success of the event, but also the speed of its implementation will depend on their quality.


Installing a boiler is not an easy task, so do not hesitate to ask the experts for help

During work you may need the following items:

  • metal ruler, tape measure or any other available measuring instrument;
  • impact tool with a set of drills (you can use a special drill equipped with an impact function, or a hammer drill);
  • mounting keys and pliers;
  • fasteners for fixing the boiler to the wall (anchors, brackets);
  • fittings that are intended for installation in water supply;
  • shut-off valves installed at the entrance to the device and allowing instant shutdown;
  • flexible hoses of different diameters and lengths;
  • tow, special tape and other materials that ensure the tightness of the connection.

Other tools may be added to this list. Their set must be compiled based on the existing conditions and assigned tasks.

Basic rules for connection

To install a boiler yourself, you need to follow several basic rules. They will help you avoid most mistakes and complete the job with the highest quality possible.

General installation rules:

  1. It is necessary to ensure the possibility of shutting off the water supply to the apartment.
  2. All branches that go to the boiler must be equipped with shut-off valves.
  3. In order for the device to function normally over a long period, it is necessary to install water filters. They will protect the device from any contamination and make the water cleaner.
  4. It is important to provide for the installation of a drain valve. It is connected to the section of pipe between the safety valve and the inlet to the tank.
  5. To simplify installation, you need to purchase various types of fittings in advance.

Mandatory conditions include the installation of a security system. It consists of a safety and check valve and ensures that the device is turned off in the event of an emergency or breakdown.

With iron pipes

Most apartment buildings have standard iron pipes. They have a number of positive characteristics, but significantly complicate the process of connecting the boiler. For this operation, you can either use welding (welding an adapter with a cut thread) or do without it (a “vampire” adapter). The second option is more preferable, as it allows you to achieve the desired result much faster and easier.

Installation is performed as follows:

  1. The selected place for insertion is carefully cleaned from the layer of paint and rust.
  2. The adapter is located on the riser using rubber gaskets and is securely fastened with bolts.
  3. The water supply is shut off, and the remaining liquid is carefully drained.
  4. A metal pipe is drilled through the central hole in the adapter.
  5. The tap is screwed on and all the necessary elements are connected.

To the metal-plastic water pipeline

This type of connection is considered the simplest and fastest due to the features of metal-plastic pipes, which bend well and hold the desired shape. A wide variety of compression fittings are used to connect parts.


Step-by-step instructions for connection:

  1. A blank of the required length is cut from the metal-plastic pipe.
  2. The location for tapping into the water supply system is carefully selected. In this case, it is important to take into account not the entire size of the tee, but only that part of it that will not go into the connection.
  3. The required piece of pipe is cut from the water pipeline. This can be done using special scissors or any available materials. The main thing is that the cut is as smooth and neat as possible.
  4. All additional parts (fixation rings, nuts) are removed from the tee, and the ends are put on the pipe.
  5. Then the edges are flared using a special calibrator or an ordinary screwdriver.
  6. The tee is inserted all the way, the fixation rings are moved, and the nuts are tightened with a suitable wrench.

Using polypropylene parts

Before you begin installing the boiler, you need to prepare all the necessary tools. Among them should be: a soldering iron, scissors for cutting plastic water conduits, adapters and tees, as well as corners.

Once all preparations have been completed, installation can begin. Wherein The following procedure should be followed:

  1. A suitable location on the pipe is selected.
  2. Then a certain area is cut out. Its width should be 2 centimeters less than the size of the tee.
  3. A preheated soldering iron is used to heat the pipe and fitting.
  4. Once the parts reach the desired temperature, they are connected. In this case, it is very important to avoid rotations and displacements, otherwise the likelihood of breaking the tightness of the connection increases.
  5. Using pipe sections of different sizes and angles, connections to the boiler are made.
  6. A threaded coupling is placed at the edges, and all parts are securely fixed.

Working with the device

Regardless of the type of device selected, its connection will be made according to the standard scheme.

This work must be carried out as carefully and carefully as possible in order to prevent even the slightest mistake.

Installation of the boiler is carried out as follows:

  1. The selected sealing material is wound around the pipes, which are located at the bottom of the tank.
  2. Tees are screwed to them. This work is best done with an adjustable wrench.
  3. Then taps designed to drain water are connected to the tees.
  4. After this, a safety valve is installed.
  5. A shut-off valve is installed on the hot water supply line.
  6. Cold water is supplied and pipes are laid to drain hot water.
  7. The electric water heater is connected to the network according to the selected electrical circuit.

Connecting a boiler is a rather difficult job that requires significant financial and time costs. If you carry it out correctly and follow all the recommendations of professionals, you can significantly simplify the process and complete the task in the shortest possible time.

Water heaters are a necessary household appliance that can make life much easier. We propose to consider how to properly connect a water heater to the electrical network, to the water supply system, in the country, as well as the installation of a horizontal boiler in the country and in the apartment and the general installation diagram.

Detailed description of connection and design

Using this method, you can connect a storage water heater from Atmor, Elenberg, Eltron, Etalon, Ferroli, Gorenje, Polaris, Stiebel, Thermex, Vega, Termex, Ariston, and others. It is considered the most effective option for connecting a simple vertical boiler, but first you need to understand the design of the device.

A standard boiler consists of the following parts:

  • element that heats water - heating element;
  • a tank that maintains the water temperature at the desired level;
  • thermostat;
  • water drainage and supply systems.

The most important thing when choosing a boiler is the method of attaching it to the wall (vertical or horizontal) and the volume of the tank. Most often, vertical devices are used in modern apartments: they take up much less space than horizontal water heaters and connect to the water supply system much easier and faster.

Step-by-step instruction:

A fuse or safety valve is a special device that serves to protect the tank from rupture at very high temperature or pressure. This can happen if the liquid pressure in the tank exceeds the nominal value (standard value is 0.6 MPa). The pressure valve hole must be open, because often home professionals simply forget to ensure that excess hot water is drained into the sewer in a timely manner, thereby exposing themselves and their family to serious danger.


It must be said that a standard valve included with a water heater most often simply does not cope with its task, and we recommend immediately purchasing a protective device separately, having already taken into account the needs and capabilities of the boiler.

  1. The valve consists of a whole system of parts, including a plumbing tee, the valve itself, an “American” coupling, a reverse-acting valve (which prevents hot and cold water from mixing, which means it saves energy and reduces pressure on the internal tank of the boiler);
  2. Now, using pipes and compression hoses, we drain the water into the sewer. If necessary, simple garden hoses can be used, although they are not intended for use in hot water conditions;
  3. We seal the connection using a special sealant and leave it to dry for 4-8 hours. We turn off the water long before the start of the process; even a slightly damp pipe will not be sealed and will quickly “disperse”;
  4. Next, we continue to connect the boiler to the water supply system.
  5. We advise you to give preference to pipes made of polypropylene materials; they have a much longer service life and are easier to install than metal ones. We connect them by welding polypropylene and leave them to dry a little. Some craftsmen carry out this operation with only metal-plastic pipes, but they are much more difficult to install and less reliable;
  6. Then, using a ball valve, we supply cold water to our boiler, connect, check and, if necessary, secure with sealant the junction of the water supply hose and the inlet opening;
  7. Through the same ball valve we also discharge hot water; this provides for connecting both a storage water heater and a flow-through one;
  8. It is necessary to make the system in such a way that when the taps are closed, water does not flow, but if you close the riser valve, liquid can be used;
  9. Now, depending on whether we are connecting an electric water heater or a gas water heater, we need to connect the device to the power system and check its operation. When using the first method, all the requirements of the PUE are taken into account: moisture-proof sockets (especially in the bathroom), grounding of a household appliance; most likely, you will also need a separate RCD for a two-phase boiler, etc.;
  10. Check the condition of the cable; it must be moisture-resistant, durable and elastic.

Installing a floor-standing boiler

Installing a floor-standing or horizontal boiler does not take much time, but it is a very extensive job. They often have a power of more than 50 kW, and they weigh about a hundred kilograms, so they are difficult to transport or simply move independently. The system is connected to hot and cold water in the same way as a vertical water heater, with the only difference being that the drain hole is on top.

Video: installation of a water heater

The grounding system is also more serious; a separate outlet is provided for powerful boilers. You can easily do it yourself, just branch a wire from the iron part of the device and connect it to an independent terminal to the ground.


This device is mainly used in production because... it has a fairly large volume, and the price is high - from 80,000 rubles (the cost was taken into account in the regions of Yekaterinburg and Moscow).

As you can see, connecting an instantaneous water heater is a simple task that requires maximum concentration. If you attach the coupling incorrectly or tighten it poorly, then breakdown is inevitable, and this can also significantly reduce the service life.

No special documents are needed if you are buying a water heater and not a gas water heater.

To provide a home with hot water, many methods are used: geysers, flow-through and storage boilers. If for some reason it is impossible to use a gas water heater, then choosing a boiler remains an alternative option. Moreover, connecting such a water heater with your own hands is not difficult.

Before connecting the water heater, please note that the units are divided into flow and storage. The design of flow-through systems includes powerful heating elements that provide rapid heating of the liquid flowing past them.

Storage water heaters have tanks of different sizes. To maintain the temperature in the tank, it has good thermal insulation. Storage boilers can be divided into types:

  • direct heating;
  • indirect heating;
  • combined.

Direct heating boiler

In devices of this type, heating elements are located inside the tank to heat the liquid. When the boiler has already been connected to the water supply, cold water is supplied from below, and already heated water exits through the top of the tank.

The temperature of the liquid is regulated using a temperature sensor. Units can be designed for vertical installation, as well as horizontal.

Indirect heating boiler

Indirect heating devices work in tandem with any coolant: a heating system or a solar system (solar panels). The design of the device resembles a direct heating device, but the only difference is that there are no heating elements in it. The liquid is heated by hot water in the heating system circulating in the heat exchanger. How to connect an indirect heating boiler will be discussed further.

Combination devices

The device turns into a combined water heater when heating elements are inserted into it (holes for installing heaters may be provided in the tank). This device is convenient to use in the summer, when the heating is turned off or when there is not enough power produced by the heating circuit.

Connecting a storage boiler

To supply and remove liquid, there are installed at the bottom of the water heater (storage) fittings. The connection for hot water is marked red, and the connection for cold water is blue. It is recommended to use polypropylene pipes, which provide a reliable connection.

The figure below shows the simplest and most reliable diagram for connecting a water heater to a water supply.

The following rules must be observed:

  • it should be possible to shut off the water supply to the home using valves;
  • branches leading to the unit must have shut-off valves;
  • if low-quality water is supplied to the mains, it is necessary to install a water filter after the shut-off valve;
  • It is necessary to install a drain valve between the entrance to the tank and the safety valve, which allows you to quickly drain water from the tank if repair or maintenance of the device is required;
  • Before connecting the storage water heater to the water supply, you must first acquire various types of fittings, T-branches (tees), flexible and rigid connecting pipes.

In addition, connecting a storage water heater requires the mandatory installation of a safety group of two valves. Safety mounted to protect the tank from excess pressure. If it rises to a critical level, the valve opens and the liquid is discharged through the drain hose into the sewer or a special container. Back the valve prevents water from flowing out of the tank when the pressure in the line decreases or is absent. Thus, it prevents heating elements from drying out, overheating and burning out.

The connection diagram of the water heater (boiler) to the water supply system is shown in the figure:

The set of parts for connecting the device to the water supply may vary depending on the material of the main water pipes.

For iron or steel pipes

How to properly connect a boiler to the water supply if the apartment (house) has a mains pipe using standard iron pipes? You can use a modern connection method, without the use of welding (welding an adapter with a thread). In this case it is used adapter “vampire”, which is a clamp supplemented with a hole and thread.

Adapter "vampire"

Installation of the clamp is very simple, and is carried out as follows:

  • the place on the riser must first be cleaned of paint and rust;
  • The clamp must be placed on the riser using rubber gaskets, and the bolts must be tightened to secure it;
  • turn off the water supply and drain the remaining water by opening any mixer tap;
  • drill a pipe through the hole in the clamp using an electric drill;
  • then, having screwed on the tap, you can begin connecting the required elements.

For metal-plastic pipes

Connecting a water heater to such a water pipeline is the simplest. Metal-plastic bends easily, and various types are used to connect elements compression fittings.

Connection steps:

  • cut the pipe to the required size;
  • Next, you will need to carefully select the place for the insertion, while you need to take into account the size of the tee minus the part of the pipe that will go into the connection;
  • you can use special scissors to cut out a small area;
  • it is necessary to remove the nuts from the tee and place them together with the fixation rings on the 2 ends of the pipe;
  • flare the ends of the metal-plastic using a special calibrator or screwdriver;
  • Insert the tee all the way, after which you need to move the rings and tighten the nuts with a wrench.

There are also fittings for metal-plastic pipes that require crimping (crimping). In this case, additional special tools will be needed.

For polypropylene pipes

Before connecting the boiler to the water supply using polypropylene pipes, you need to prepare: soldering iron water pipes made of plastic, scissors for cutting it, a pair of tees and adapters for the threads that are located on the valves and emergency valve, as well as the number of corners required for the design. Further:

  • the connection location is selected;
  • a section is cut out in the pipe equal to the width of the tee, minus 2 centimeters (1 cm will go into the tee on each side);
  • using a soldering iron, it is necessary to heat the pipe and fitting to the desired state and connect them (they cannot be turned during connection, as this may break the seal);
  • using sections of water conduit of different lengths and angles, connections are made to the nozzles of the unit;
  • A threaded coupling is soldered onto the end of the water conduit, after which the entire structure is securely connected.

Step-by-step connection of all elements

Regardless of which water pipelines will be used in an apartment or house, the connection diagram for the storage unit and the algorithm for connecting all elements will be the same.


The diagram for connecting the storage boiler to the water supply is shown in the figure:

Electrical connection

It is highly not recommended to plug the device into a regular outlet. This option for connecting to the electrical network cannot be considered safe and can lead to a fire. And yet, how to properly connect a water heater? The boiler must be connected to the home electrical network through a separate line from the panel. The line is equipped circuit breaker, and the power of the machine must be at least 16A. The factory wire is disconnected from the heater and a new one is connected. three-core cable(copper), having a cross-section of 2.5 mm.

The device is required must be grounded. Otherwise, when bathing in the shower, there may be a slight electric tingling sensation and other troubles, including wiring failure and fire. Grounding is connected in the distribution panel. If you don’t understand anything about this, invite an electrician.


Connecting an indirect heating boiler

The indirect heating device does not have its own heat source, but uses heat energy from other sources (central heating, gas or solid fuel boiler, etc.). Therefore, for each source, an individual connection diagram for an indirect heating boiler is selected.

R heating system

The device with indirect heating has harness, which is connected to the water supply and heating circuit. In this case, you must adhere to the following rules:

  • cold water must be supplied through the bottom of the tank;
  • the heated liquid exits through the top of the unit;
  • there should be a recirculation point in the middle;
  • the connection of the thermal energy carrier must be such that it begins to move through the top of the heat exchanger and exits through its lower pipe - thanks to this movement, the maximum efficiency of the device is achieved.

With three way valve

This connection of an indirect heating boiler is realized if the pipeline through which the supply is supplied has circulation pump. As can be seen in the figure, the heating circuit and the unit are connected in parallel, and a three-way valve (controlled by a temperature sensor located in the body of the device) is mounted after the pump.

The valve is connected to the unit with one of its outputs. A tee is cut into the return line in front of the boiler, to which the outlet pipe of the heat exchanger is connected. At this point, the insertion into the heating system can be considered complete.

Operating principle of the circuit

When information is received from the temperature sensor that the liquid temperature in the tank is below the set temperature, the valve switches the coolant supply to the unit and the heating system is turned off. Thus, redirecting the entire flow of coolant through the heat exchanger promotes rapid heating of the liquid. When the liquid is warmed up enough, the valve will again direct flow into the heating circuit.

This boiler connection diagram can also be used to connect to a double-circuit boiler.

R non-volatile system

In the existing scheme, in which the boiler is non-volatile, it is recommended to place the device above the level of radiators. With this arrangement, coolant circulation will occur due to gravitational forces. Although, a pump can also be built into this circuit, but if there is a power outage, there will be no heated water.

With this type of connection, it is necessary that the water pipe going to the unit have a cross-sectional diameter that is 1 step larger than that used for heating. Due to this, priority is achieved.

With recycling

A unit with recirculation allows instant supply of hot water to the consumer. This is convenient because it does not require draining cool liquid until hot liquid starts flowing. This opportunity is provided by the installed pump to maintain circulation in looped circuit. This system is called recirculation. This design often includes a towel dryer.

In the recirculation system in the apparatus piping the following is used:

  • a check valve that prevents the flow of heated and cold water from mixing;
  • air duct - its task is to prevent air from entering when the pump is turned on;
  • safety valve – relieves pressure in emergency situations;
  • expansion tank, is designed to compensate for the expansion of the coolant, while the pressure in the tank should not rise above the activation level of the safety valve.

Thus, if you connect the water heater according to all the rules, this will allow the units to operate in the correct mode and provide the consumer with hot water supply.