Water discharge from the water heater through the valve

Do you need water drain from the water heater with a simple one: when it is not required, methods, air descent, shutting and storage of boiler

Drain water from a water heater during downtime It is not always required. Temporarily not used tank is left filled. Drill is necessary when dismantling, removing for long.Term storage, maintenance. There are several ways to launch water from the boiler.

Drain the water from the water heater, if it is not used, is required, in compliance with the preparatory stages:

  • Disable water equipment from the network, otherwise there is a risk of “dry work” of Ten and burning;
  • The water in the tank can be hot, so they are waiting for cooling or spending it with a de.Energized boiler.

When you need to drain water from the water heater

Manufacturers do not recommend draining water from the water heater without the need. Introduction to the air container contributes to the oxidation of metal parts. Corrosion damages the heating element and tank walls.

water, discharge, heater, valve

Heating element of the water heater spoiled by corrosion

Because of this, a leak or a breakdown of the heating element may occur. There are a number of cases in which it is impossible to do without devastation:

  • Preparation of the system for low ambient temperature. The irregular use of the boiler in the winter season can lead to freezing and depressurization of the system.
  • Repair. The failure of the heating element requires its replacement. To dismantle the heating element, the accumulative boiler should be devastated.
  • Cleaning surfaces. In the process of heating on the internal surfaces and details, the plaque settles. It prevents normal heating, which leads to increased electricity consumption. Restoring performance requires surfaces to clean.
  • Replacing the magnesium anode. The procedure is carried out simultaneously with surface cleaning.
  • Modernization of the strapping and replacing the elements of the pipeline. The installation of new elements of the water heater strands requires its devastation.

The owner of the house or apartment independently determines whether it is necessary to drain the water from the water heater. The main thing is to comply with safety requirements. Before starting work, make sure that the container has cooled down. Also, you should not leave it empty longer than the necessary.

Whether you drained water from a storage boiler with your own hands? How is the strapping of your boiler arranged?

The foreman and the organizer of absolutely all processes related to repair work. I have been repairing for more than 20 years and I am an expert in this area. When writing an article, he tried to make it as useful and understandable to every person.

How to drain water from a boiler depending on the connection method

There are several options for installing a water heater. Depending on these factors, the methods of draining the contents will differ. In each case, there is a strict sequence that must be adhere to in order not to make mistakes.

With the standard installation method

For this design, simple switching of the pipes is provided. When connecting them with a boiler in a small section, a tee is necessarily installed in front of the pressure discharge valve. A valve is usually installed on it, with the help of which drain is performed. Therefore, for this method of devastating the tank of additional tools is not required. Subject to the correct connection of all pipes to drain the water will take about 10 minutes.

See above the connection diagram of all parts with the water heater.

When used an advanced method

In such a situation, the installation of two tees is provided, which are attached not only to the input pipeline, but also to the weekend. To lower water with such a connection system, you must perform actions in the following sequence:

  • Block the water supply crane;
  • Open the valve of the mixer;
  • Connect the hose to the output hole and direct it into the container;
  • Activate the safety valve, for which open the air supply on the tee.

Floor boilers have a similar method of devastation, provided that their installation is made improved by.

Simplified installation option

The simplified connection method involves only the connection of flexible hoses to a cold and hot pipe. To perform the descent in this case, open a hot valve, while prevent the supply of water to the tank. Then, the container should be set and open the safety valve flag. If the water is excreted too slowly, you can completely disconnect the hot highway from the electrical appliance. The main thing here is to choose a sufficient container for water receiving.

If in the process of devastating the tank you do not want to extract the fuse, then it must be fixed in the open position so that the spring does not lower and does not overlap the outlet channel.

Is it possible to put other valves

Иногда вместо специального предохранительного клапана для бойлера ставят подрывной, который предназначается для аварийного сброса воды на отоплении. Although their functions are similar, the main mode of operation is fundamentally different. The subversive should work only in emergency situations. It is designed for a volley discharge of a large volume of fluid. It is not suitable for constant pulion of small portions of water. Accordingly, it will not work correctly.

Another case is the installation of only the check valve. He will not let the water drain when the pressure is reduced in the water supply, but he will not save from increasing pressure in the boiler. So this option is also not working.

Whether it is necessary to drain water from the water heater during its downtime

In houses and in summer cottages, where owners live only during the summer, you need to prepare all engineering systems in advance for winter. If the device is not used for a long time, it is necessary to take care of its competent storage. In the article, the master plumber will figure out whether it is necessary to drain the water from the water heater during his downtime.

What are water heaters

A storage water heater or boiler is a system that consists of a heat.Insulated capacity and thermal source placed inside. Often it is equipped with a special control unit.

With its help, the desired heating temperature is set, and it also helps to save energy, since the heater is turned on only if the water drops to a temperature below the given.

  • The ability to connect the required number of hot water parsing points.
  • High water pressure in the water pipe is not required.
  • Low power consumption (up to 2 kW).

Water Heater Temperature & Pressure Relief Valve. How it Works & Installation Tips

The accumulative water heater is quite simple, but is reliable and economical. Its main components include: internal tank and heating. Later models are somewhat more complicated. It works on a principle similar to the principle of thermos with heating, therefore, in the latest developments, special attention is paid to the internal coating of the tank.

The electric water heater includes:

  • Metal or plastic case with brackets and grooves for fasteners;
  • Stainless steel tank, or covered with fiberglass;
  • The heat.Insulating layer between the tank and the case; ;
  • Tubular electric heater; ;
  • Control block;
  • Valve protective system; ;
  • Temperature sensor (thermometer);
  • Indicator light;
  • Temperature indicator (analog or digital);
  • Electrical cable.

Cases when you definitely need to drain water from the water heater

So that a person does not doubt whether it is necessary to drain the water from the tank or you can do without this procedure, you need to clearly decide on the problem that has arisen. Many manufacturers of water heaters do not recommend leaving the device without water for a long time due to the danger of corrosion of metal parts.

Mandatory need to drain water arises in cases:

water, discharge, heater, valve
  • The boiler remains for a long time in an unheated room. The liquid can freeze and simply break the tank, expanding during crystallization. In addition, it is necessary to drain water not only from the water heater, but it is also advisable to devastate the entire pipeline system in such a room.
  • The deadline for the factory guarantee passed, so all the necessary manipulations for repair and maintenance must be carried out by yourself. In such cases when it is really necessary for prevention to drain water from the water heater, are: cleaning the tank and the heating heat from the scale, replacement of the magnesium anode, elimination of breakdowns of the electric heater.

Drain Valve Replacement on a Water Heater

How to choose a safety valve

There are magnetic-spring, lever, lever-carbon, membrane shutters. For water heaters, spring.

Types of safety valves for electric heaters, 3 groups for different volumes:

On any capacitive water heater, you can put the listed types of safety shutters.

  • Combining and the third valve. Bypass with an additional function of discharge of excess MPa into the high water line, until the value in it becomes equal with the boiler. This is the best option for choosing;
  • Reset valves with pressure adjustment. Are used less often, the error in setting can be fatal, more often for industrial equipment, heating.

The discharge valve adjustment in customizable models is carried out exactly according to the instructions, a selector or a rod under the lid (hexagon, screwdriver). Sometimes the positions are not signed, so the step and compliance of the regulator’s position by the number of MPa must be checked according to the technical documentation. Standard adjustable models. On the range 6. 10 bar with a step of 0.5 bar.

Initially, in the configuration of EVN there is an emergency valve for the desired pressure. If the node is bought, then to the limit value indicated by the manufacturer on the tank and under the diameters of its fittings (usually 1/2 ”, for a capacity of 100 l 3/4”). The underestimated value of MPa will lead to a constant course, more to the non.Work of. Cannot be taken with a margin, the value should definitely coincide.

How to choose a high.Quality safety valve for capacitive electric buses:

water, discharge, heater, valve
  • Seamless casting, brass, sometimes covered with nickel. Aluminum alloys with iron or copper are less of high quality;
  • When pressing the rod, the plug walks tightly, possibly with a slight jamming at the end;
  • If, with strong pressing on the rod, the air in the cylinder and the air will pass freely, then this is a sign of poor quality;
  • Relief marking is not only with the arrow of the direction of water, but with the size of the operation, without it (even if the parameters are in the instructions), it is better not to buy the product.
  • On the reverse segment. The direction of the direction, may also indicate the diameter of the connection;
  • On the reset:
  • Driving pressure;
  • Manufacturers labeling, standards: en, ch, 10.10, 14.89, 23.12 14.13, rr. The main thing is that the presence of designations is precisely on the case, the decoding. On the sites of the factories, in the instructions;
  • On models with the bypass segment often the letter P.

Calculation of the safety valve, this is a comparison, what pressure (on the case, in the instructions) it is also configured for a storage water heater. The product is selected under the boiler. The calculation methodology takes into account that there are adjustable models, then they are configured to the critical parameter specified by the manufacturer for EVN.


When choosing a high.Quality device, it is necessary to pay attention to the external case on it should not be visible pronounced seams of the remaining casting, other defects and traces of additional processing. There is a marking on the safety valve on the safety valve, as well as the arrow indicating the direction of water supply. All marking inscriptions should be made clearly by casting method, which is performed simultaneously with the production of the product. The crane on the side pipe should walk tight, with a slight click when fixed in the position openly. Estimated price from 500 to 1.000 products of branded manufacturers have a passport indicating the main parameters, primarily working pressure and/or quality certificate.

Do I need to drain water from the water heater

It depends on the conditions of its work, design and frequency of using the boiler. When to drain the water becomes mandatory?

  • If the water heater is located in the country or in another room of periodic residence. With the onset of frosts, water inside can turn into ice and “tear” hermetic storage tank;
  • The drain of water will come in handy when an accident occurred on the water supply and there is no water in the apartment. The storage tank can provide 80-100 liters of water. It can be used to wash hands, vegetables or drain into the toilet.

Whether to drain water from a water heater or is not necessary during the departure? For a boiler, which is installed in a heated room, draining the water during the departure of the owners is optional. However, it is necessary to take into account the design features of your heating device:

  • If the tank is made of stainless steel, it is not terrible to corrosion in water. But it will corrode in wet air faster;
  • For copper heaters, it is better to drain water. Copper is more destroyed in hard water than in wet air. And the service life of heaters is always less than the accumulative tank (they have to be changed more often);
  • If the water into the water heater comes from a centralized water supply, it contains disinfecting components (chlorine). They limit the propagation of any bacteria and the appearance of an unpleasant stagnant smell;
  • If the water into the tank comes from the well, it does not contain chlorine. Therefore, she may have stagnation with the formation of a putrid unpleasant odor. The drain of such water warns its stagnation and decay.

To get rid of the smell of stagnant water, rinse the boiler (turn on the tap and launch water from the tank for a long time until all the stagnant liquid comes out). Then fill the heater and turn on the maximum heating (90-95?C). Such “boiling”, if necessary, can be done several times.

If you decide to drain the water, produce devastation only after cooling hot water to room temperature. The remaining manipulations are already familiar on the basis of the article.

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