Weak pressure of hot water from a geyser: reasons for reduced pressure + cleaning instructions

The most common causes of breakdowns

Let's start a review of breakdowns using the example of such simple geysers as Oasis or Neva. These are fairly simple devices, so almost any man who knows how to work with tools and has relatively straight hands can handle their repair. Here is a short list of possible faults and causes:

• Lack of traction;
• Insufficient water pressure;
• Insufficient gas pressure;
• Inoperative ignition system;
• Clogged tubes and water supply filter;
• Burner clogged;
• Malfunction of the membrane or gas block;
• Inaccurate mixing of cold water in the mixer;
• Faulty electronics or sensors.

Now we will look at how to eliminate breakdowns and causes of lack of ignition.

Starting the device and adjusting the temperature

To correctly set up hot water in the device, you must:

• Open the hot water mixer fully;
• Using the water switch, select the required temperature value;
• Close the tap.

According to the advice of professionals:

• Wait for the moment when the pressure in the line drops, but the column will still work;
• Turn the water toggle handle to the maximum;
• Turn the gas regulator to the minimum value until the temperature is as desired.

For final preparation, it is worth adjusting the gas supply. To do this, you need to look at the technical data sheet and find out the minimum value for this brand.

The toggle switch is turned to the minimum value.

Turn on the gas supply valve. U" and "Ariston" do this after joining the network. The Oasis, Junkers and Bosch gas water heaters are connected when the batteries are installed.

The hot valve is turned on and the device starts working.

How to adjust the water temperature

Turn on the mixer and check the water heating temperature. It must be twenty-five degrees more than the original one. It is worth noting that the water in a gas boiler heats up gradually. The geyser is adjusted using the gas lever.

Professionals do not recommend heating water above fifty-five degrees. This has a bad effect on the device, as scale forms.

Blood pressure problems

Setting up a geyser requires some time. Accordingly, the result will be visible later. After each stage, it is worth pouring out the water and letting it heat up again so that the values ​​are correct. Low pressure in the device may interfere with normal operation.

If you have problems with blood pressure, you should perform the following manipulations:

• Remove the casing from the device;
• Loosen the locking bolt, use a pressure gauge to check;
• Remove the seal from the adjusting screw;
• Turn on the boiler;
• Set the values ​​to maximum, unscrew the hot water supply taps;
• Adjust the desired pressure.

The Bosch gas water heater, namely its pressure in the nozzles, is regulated in the following way:

• Remove the casing;
• Attach a pressure gauge;
• Loosen the locking screw;
• Attach a pressure gauge to check the pressure in the injectors to the nozzle.

Next, the Bosch gas water heater with maximum thermal power is regulated:

• Remove the seal from the screw;
• Turn on the device;
• Hot water taps are turned on;
• The adjusting screw adjusts the pressure in the nozzles;
• Put the seal in place.

There are brands that have a special “Winter-Summer” mode with temperature adjustment. This handle was made at the bottom. Adjustment of the Oasis gas water heater is located on the front panel. The peculiarity of the mode is that in winter the power is higher than in summer. The heating power of the liquid in the column is directly related to the temperature of the inlet stream. In winter, the regulator is set to “maximum”, the heating will be at its highest. In summer, the temperature of the inlet flow is higher and is set to the minimum position. This saves resources.

It is easy to remove bad pressure when checking.

To do this, you must perform the following manipulations if the device has already been used:

Pay attention to the rubber membrane. The performance of this part is directly related to the pressure in the line

At the moment the integrity of the membrane is broken, namely when it is exhausted, gas does not flow and the burner does not turn on. The problem is solved by replacing the part. Pay attention to the mesh filter. It is located at the entrance to the water block. The water pressure becomes lower due to debris clogging the part. The problem is solved by cleaning.

Leaking pipes

You can find out the whole truth about the conspiracy associated with the selection, operation and maintenance of gas water heaters (instantaneous water heaters) of all manufacturers and models.

If water begins to drip from the column, perhaps the reason is that fistulas have formed on the copper pipes. In order to find the location of the leak, you need to carefully inspect the heat exchanger with the water turned off. Some fistulas are easy to find; you will see water coming out of these places. Small holes can be seen by the green spots and rust around them.

There are three ways to fix a leak:

Install a clamp with a rubber gasket. If space allows and the pipe does not fit tightly to the casing, the simplest, fastest and most effective way is to install a metal clamp with a rubber gasket. Despite its simplicity, this method allows you to eliminate the leak without damaging the structure. Solder the fistula. Having previously cleaned and degreased, the leak area is covered with flux. After this, using a powerful soldering iron or a torch with a gas cylinder, the fistula is soldered. In this case, it is necessary to ensure that the solder covers the desired section of the pipe with a layer of 1-2 mm. If several holes are nearby, it will be effective to solder a piece of copper plate. It is not recommended to solder cheap Chinese heat exchangers. They are usually painted on top to hide the uneven color of copper with impurities. In such columns, the pipes are too thin and will burn through during soldering.

Use cold welding

It is important to carefully look at the instructions and make sure that it can withstand high temperatures. A piece of cold welding is taken out of the packaging and kneaded with gloved hands until it begins to harden.

After this, it is applied to the pipe and smoothed until it hardens completely.

A leak can also form due to worn gaskets. If water leaks from the pipe joints, you should simply replace the gaskets there with new ones.

Weak or no water pressure

The automation in all gas-powered water dispensers is configured to turn on only when there is a certain water pressure in the water supply. If there is no water at all, or the pressure is too weak, this will be the reason why the column does not turn on. First of all, you need to check the presence of water - to do this, you just need to open the cold water valve.

Further actions will depend on the situation:

• If the water does not flow or its flow is very weak, then the problem is in the water supply. In this case, you just need to wait until water is given at normal pressure.
• If cold water flows normally, then the problem is that the water heater itself is clogged (read: “Why do you need to clean the gas water heater and how to clean it correctly”).

To clean the column, you can perform the following steps:

1. Close the supply valve on the gas pipeline.
2. Unscrew the distribution pipes.
3. Remove the water heater.
4. Turn the column upside down and place it on a flat surface.
5. Use a syringe to inject cleaning liquid into the heater. This special composition can be purchased at specialized points of sale.
6. Wait a few hours for the liquid to take effect. The time is indicated in the instructions.

If you don't want to do the dirty work yourself, you can invite a specialist.

Which geysers operate at low pressure?

If the reason for the low pressure of hot water is not in the gas equipment, but in the water pipes, the problem can be solved either by normalizing the pressure in the pipes, or by purchasing a gas water heater that will function properly even with poor water pressure.

Modern geysers, which are equipped with a water pressure control device, can cope with this task. They work according to the following principle: the stronger the water pressure, the higher its temperature, and vice versa. Thus, if you set the minimum water temperature, the column will turn on even with low pressure. However, if problems with hot water pressure are constantly observed, it would be more advisable to equip the system with a pump.

To clean the heat exchanger yourself from scale, you can watch the following video from a Youtube user, in which everything is explained and described in detail.

Weak water pressure at the outlet of the gas water heater: causes and solutions

Weak water pressure when leaving the column occurs for the following reasons:

➤ filters at the inlet of the water block are clogged

The problem may be caused by a clogged strainer, which is located on the supply line to the water unit. Due to the fact that it is clogged with dirt, water flows poorly from the gas water heater. You can check this by disconnecting the hose or pipe (if the water and gas supply is shut off) from the water unit of the geyser. If the mesh filter is clogged, then it must be removed and cleaned of lime deposits, or buy a new one (for each model of the geyser you need to purchase your own filters ).

➤ scale in the heat exchanger and the tubes extending from it

In this case, the heat exchanger must be removed and washed from the inside with a special liquid.

But, as studies by manufacturers of geysers and boilers have shown, all flushing liquids are an aggressive environment that not only gets rid of scale, but also contributes to the destruction of the walls inside copper tubes. When washing in this way, microscopic “notches” appear on the inner walls of the tubes, in which even more scale will form, since there is somewhere for it to linger. Therefore, flushing the heat exchanger is a temporary solution to the problem.

➤ clogged faucets (taps)

Water pipes have deposits on their walls. During repair work, the water is turned off. At the end of the work, when the tap is opened, a water hammer occurs, which carries dirt from the pipes into the mixer. As a result of such processes over a long period of time, the mixer (faucet axle and (or) hose leading to the mixer) becomes clogged, which prevents the free flow of water.

➤ lack of regular maintenance of the gas water heater

It is necessary to regularly (at least once a year) maintain the geyser, and it must be carried out by a qualified specialist, since your safety depends on it.

We repair geysers and, if necessary, will be happy to help you.

Call a specialistCostContacts Soldering a geyser heat exchanger at home

Prevention

If there are problems with water pressure from the water heater, it is necessary not only to eliminate the causes, but also to prevent similar problems from occurring in the future.

Preventive measures will help with this:

1. Adjust the temperature and pressure level. Sudden changes in the flow of water into the unit should not be allowed, so as not to provoke detonation. In this case, the specified heating temperature should be sufficient for the selected water pressure.
2. Overheating leads to the formation of excess scale and detachment of radiator particles (burnout). Therefore, the water temperature should not exceed 55 degrees.
3. Monitor the condition of the filter. The cleaning element is designed to retain salts that damage the surface of the pipes. The filter will also protect the column from small debris contained in the water.
4. Installing an electric water softener will help reduce the risk of scale formation.
5. If you notice a drop in outlet pressure, immediately contact a specialist. He will check the operation of the column and provide service.

Problems with the water heater or water heating boiler will not arise if preventive measures are taken in a timely manner. The main condition for long-term operation of the units is soft, clean water and the absence of sudden pressure surges.

What to do?

Scale on heat exchanger pipes

The heat exchanger consists of a casing and pipes into which cold water flows and is heated. In any case, over time, a small layer of scale appears inside. The main reasons for its occurrence are high water hardness and operation of the water heater at temperatures above 80 degrees.

You can repair the column without removing the heat exchanger. The gas is turned off and the water valve is closed. You need to remove the casing from the device and drain the water. To do this, unscrew the union nut from the water inlet to the water heater and turn on the tap located lowest in the system, usually a tap in the bathroom. Termaxi geysers have a special tap for draining water from the system. In this case, it is easier to drain the water into a substitute container.

After this, the nuts at the inlet and outlet of the heat exchanger are unscrewed and a special anti-scale liquid, which can be bought at hardware stores, is poured into it through a hose. You can also use a solution with vinegar or citric acid.

The column is left in this form for several hours. Then everything is connected back and the water valve is turned on. You need to slowly turn on the hot water tap. Dirty liquid should flow out. If after this the pressure increases, then the heat exchanger pipes have been cleaned. If necessary, you can repeat the entire cleaning procedure several times.

In order to avoid this breakdown, you need to use the water heater at temperatures of about 40-50 degrees. You can also install a filter at the inlet, which will purify the water from salts, which form scale.

How to fix the situation?

If the pressure of hot water in the column decreases, you need to identify the cause and correct it.

Each problem has its own solution:

If the dispenser has warranty service, it is better to entrust the cleaning work to a service technician. Otherwise the owner will lose the warranty.

If problems arise with the water heating boiler, then it is necessary to identify and eliminate the cause:

• blockages - clean the filters installed at the entrance to the boiler;
• scale on heating elements - clean with citric acid solution or industrial means;
• appearance of cracks on the tank - replacement of equipment;
• malfunction of the pressure regulator and thermostat - replacement;
• blockages of the faucet or its parts - cleaning the faucet axle box, filter.

If there is a significant decrease in water pressure from the boiler, you should stop using it until the problems are resolved.

How to fix a leak

Having discovered the cause of the leak, you can begin to eliminate it. Our further actions will depend on which part of the gas water column is the source of the leak.

Radiator leak

The fact that there is a crack or hole in the radiator is indicated by the presence of green spots on this part. The procedure for eliminating a leak in the radiator will be as follows:

• We shut off the water pipes to prevent water from entering the column. Disconnect the water supply hoses from the column. Drain the remaining water from the radiator. To remove liquid from the coil, use a vacuum cleaner or pump.
• Armed with sandpaper, we clean the damaged areas. Then we treat these areas with a degreasing solution and wipe them dry.
• We take a soldering iron with solder, which can be used at temperatures above 180 degrees (the power of the soldering iron must be at least 100 W). Grind a piece of rosin or grind an aspirin pill into powder. Sprinkle this mixture onto your work surface.
• Having heated the soldering iron to the desired temperature, we increase the solder to a height of approximately 0.2 cm.
• We repeat this procedure for each through damage.

Alexander Gerasimov in his video will show and tell you how to properly solder a geyser radiator yourself.

Leakage in threaded connections

Quite often you can detect leaks in the threaded connections between parts of the gas water heater

Pay attention to which pipe has a leak: the left pipe usually supplies water for heating, and the right pipe usually supplies gas. As a rule, water begins to leak from the pipe if the sealing gasket is worn out.

Changing this part is very easy.

1. The first thing to do is block the water supply.
2. Then we disassemble the connection in which the problem is detected (we use a regular wrench for this purpose). We remove the worn gasket.
3. We clean the connecting elements from dirt and degrease them.
4. If the thread on the American nut is damaged, it should be replaced.
5. Then we install a new rubber gasket and assemble the connection.

Leaking pipes

Sometimes a leak is found not in the connection of the tubes, but directly in them themselves. Experts advise that if cracks and small holes are detected in the tubes, use the same method as for eliminating a leak in the radiator, that is, soldering. However, in the absence of proper care, it is not always possible to detect damage in time. If you realize it too late, and the tube has already become rotten beyond repair, you will have to replace it.

Those who have encountered a similar problem say that it is very difficult to find a suitable tube, even in stores specializing in the sale of gas equipment. As a replacement for the tube, you can use a corrugated stainless steel hose or flexible water line.

How to properly solder a tube without spoiling it and extending the life of the gas water heater can be seen in the video by Vladimir Pekar, which is presented below.

How to make a water regulator for a gas water heater for low water pressure?

First, turn the right knob on the front panel of the column to the left all the way, this is to adjust the water supply.

Left, on the contrary, to the minimum level (this is the gas supply).

You can, of course, try to “manipulate” the water regulator of the gas water heater, but all these tips can lead to damage to the water column, in the best case.

Modern water dispensers are equipped with a low water pressure sensor, I advise you not to “test its patience”; if the pressure is low, the sensor is triggered, then so be it, safety is paramount.

If you still insist, then there are options (I emphasize that the options are not useful for the column).

First of all, remove the mesh filter; it prevents the free flow of water.

Next, on the right side of the water regulator, there is a plug, unscrew the plug, there will be a screw inside, by tightening the screw, you can turn on the column even at low pressure, but popping noises and other unpleasantries are possible.

If you want to remove the retarder ball altogether, to do this you need to remove the water unit, unscrew the 8 bolts, disconnect the unit, remove the membrane, in the area of ​​the adjusting screw you will see this same ball.

The ball partially blocks the channel, by the way, the channel can also be “processed” with a round needle file, increasing its diameter and increasing the water flow.

But I repeat, all this advice is from the “harmful” series. Yes, and it’s not clear what you will do when the pressure in the system normalizes, disassemble the water unit each time? Should I remove and replace the retarder ball?

The correct options are either to buy a boiler, or a water heater that is designed for low water pressure, or to install a pump that increases the water pressure in the system,

By the way, the pump is not a bad option, it works in auto mode, installation is not difficult, and it is not expensive.

We service the igniter and water intake unit

If there is a need to clean the water unit, do not rush to disassemble the entire device. Take a look at the operating instructions for the water heater, find the “frog” in the diagram and follow the following algorithm:

1. Remove the adjuster knobs and front cover.
2. Dismantle the water unit by disconnecting the pipes.
3. Unscrew the screws holding the cover, remove it and get to the membrane.
4. Clean the filter - mesh and water holes in the frog body using a wooden stick or soft copper wire. Remove scale with a brush.
5. Rinse the parts with water and assemble the assembly. Replace damaged or cracked membrane immediately.

Clean the pilot burner jet (wick) with thin copper wire or a toothpick moistened with alcohol. Wipe the ignition electrodes and the flask of the flame sensor (thermocouple) thoroughly from soot, otherwise over time the column will begin to turn off spontaneously.

What causes the heat exchanger to become clogged with scale?

How to understand whether you need to clean the heat exchanger or not, and what causes it to clog. As a rule, you yourself and only partly the hard water are to blame for the overgrowth of instantaneous water heater tubes with scale. Why do you do it yourself, because everyone around you is doing nothing but scolding hard water. The whole point is that scale deposits

begins at water temperatures above 80 degrees.
To be precise, at 78 degrees there are still no deposits, but at 82 intense scale deposits begin. Why do you ask such a temperature? For swimming, a temperature above 42 degrees is not needed; to remove fat, 45 degrees is enough; fat removers cope with it even in cold water. You don’t need more than 60 degrees for washing, but now they mostly
automatic washing machines

Draw your own conclusions. Many people leave the gas heater running on the igniter

, undoubtedly convenient, there is no need to light it and adjust it every time, the flame on the igniter is small, but if you drilled it out for reliability, then an hour is enough for the temperature in the heat exchanger of the heater to rise to 90 degrees, and that’s scale.
And our third mistake is the operation of the gas water heater
with low water flow - read low water pressure in the water supply.
Of course, an instantaneous water heater cannot operate in normal mode at low pressure. But Russian craftsmen and “the devil will make pancakes bake on Maslenitsa.” We tighten it up where necessary, drill out the igniter, put a washer at the output of the gearbox and voila, the water barely flows, but the column burns and even throws out boiling water and steam. Here's your scum
.

Conclusions:

To prevent scale from forming in the column, do not be lazy to turn it off and on as needed; if you don’t want to, use an electric instantaneous heater or a double-circuit boiler designed to produce hot water. And it’s not true that boilers heat water worse; personally, I have the most ordinary, cheap double-circuit boiler “Zhitomir”, which provides hot water to two bathrooms and a shower without any problems.

Do not modify the automatic flow heater, if you have low pressure, it is better to install a booster pump

, there are a lot of them being produced now, you can always choose the one that suits you.

When you turn on the gas water heater, adjust the water flow according to the temperature, you don’t need hot boiling water, tell me why dilute hot water with cold water, if we now pay the same for both.

When it is necessary to wash the coil (heat exchanger) of a gas water heater.

Geyser heat exchanger.

Well, now, if we already have a problem, let's start flushing the heat exchanger. You can understand that the heat exchanger of the geyser is clogged by the following symptoms:

— low pressure in hot water tap

with good pressure in the tap with cold water, the column either does not turn on at all, or turns on and immediately turns off.

Of course, the tap at the entrance to the water heater may also break, so first check it, and only then disassemble the gas water heater.

Once you have made sure that the tap is working properly, you can begin disassembling the hot water column.

How to disassemble the column heat exchanger. Tools for work.

I don’t think it’s worth describing the entire disassembly process. The main thing is to make sure you have the necessary tools. This is a minimum set of “Bako” or pipe wrench No. 1, an adjustable wrench, screwdrivers - Phillips and flat head, minimum No. 5, a set of spare paranit gaskets

.
Will you also need 60 centimeters of rubber hose? inches with a metal clamp. In some columns, the tube may be larger, so check its thickness yourself. And of course, purchase anti-scale agent
; it is sold in the form of a dry powder, diluted with hot water.
If you're lucky, you can find it there, in a plastic bottle. It’s better to take 2 pieces so that it’s enough for two times.

First, we remove the fittings from the boiler - handles, etc. Then the casing. Remove the casing, determine the water supply pipes

so as not to accidentally touch the gas.

Usually, everyone then recommends removing the heat exchanger and washing it outside the column. We will do things differently.

Prevention of scale formation in the heat exchanger

To avoid the hassle of dismantling the heat exchanger and descaling it, you should use the gas water heater correctly.

It is easier to prevent the formation of salt deposits than to get rid of them later.

Any instantaneous water heater requires proper care. Information on servicing a specific model can be found in the instructions that come with the gas water heater.

Preventive measures:

1. You should swim in water with a temperature of up to +40 °C. This temperature regime is good for health and does not harm the column.
2. For washing dishes, a temperature of 45-50 °C will be sufficient. The water will be comfortable for your hands and the fat will dissolve well.
3. Washing can also take place at a temperature of 45-50 °C. For severe contamination, you can add another +5 °C.

The process of formation of solid deposits is accelerated by temperature conditions with intense heating up to +80 °C. Scale begins to be deposited even on the perfectly smooth walls of the heat exchanger, and if there is roughness on the surface, then the fastening becomes “reinforced concrete”.

Consideration by model

The problems outlined above may occur in models of different brands and capacities. Although modern modifications are equipped with special technology that controls water flows.

However, columns from different companies may have their own reasons for low water flow or its absence.

The following is an overview of the models of some companies and the main reasons for the weakening pressure in them.

The first modification is from the Neva brand.

If there is no hot water coming from the Neva gas water heater, the most common answers are:

1. Loss of pressure in the pipeline. To solve this, you need to involve specialists.
2. Lack of gas in the main. You need to contact the appropriate service.
3. The hot water valve in front of the appliance is not open enough. It needs to be checked and, if necessary, closed properly.
4. The water consumption mode was chosen incorrectly. Adjust the unit settings in the special menu on the display.
5. Filter contamination, maintenance. Carry out the previously mentioned cleaning operations.
6. Breakage of the membrane in the water mechanism.

The greatest problems arise with the designated membrane.

If it is deformed and does not give any reaction to water pressure, replace it.

A device with a damaged membrane cannot operate stably. And it is possible that it will not turn on at all.

The second unit is Zanussi.

The following dilemmas often arise here:

1. The water is heated poorly. And at the exit there is a cold stream. In such a situation, it is necessary to reduce the water pressure by using a control system on the device panel. The maximum fuel supply to it is set.
2. The same spectrum of contaminants (maintenance, filters). The solution methods are identical.

The third example is Bosch.

In practice, for models of this brand, the reasons for a weak hot flow or its absence are:

1. Errors in water supply settings.
2. Clogged components.
3. Installation defects.

Water doesn't heat up

Weak pressure of hot water from a gas water heater is not the only problem that water heater owners face. The device may not heat up at all, resulting in cold liquid.

Why is there no hot water coming from the gas water heater:

• Dirty deposits have accumulated on the outside of the heat exchanger.
• The flame is not strong enough to heat. The problem of insufficient gas pressure will have to be corrected. Perhaps clean the parts.
• The heat exchanger is overheating. This violation leads to the appearance of a layer of scale. The normal operation of the device is disrupted. Cold liquid flows.
• The pressure level in gas pipes is low. This is a reason to contact the gas service.
• Lack of constant maintenance and pollution prevention. It leads not only to heating failure, but also to poor water pressure from the water heater.

What to do if cold water flows:

• Turn the regulator all the way to the right. Close the tap halfway. This will slow down the water movement and improve heating.
• Check gas pressure. Only a specialist can do this.
• See how the mixer works. It can add cold water to heated water.
• Determine if the filter or faucet is clogged.

Important! If the heat exchanger is seriously damaged by scale, it must be replaced.

What to do if there is poor water pressure in the water supply system of a private home

Low water pressure in a private home, which is served by an autonomous water supply system, is also a common problem. In private homes, low pressure of cold water supplied by a pump from a well or a well can not only cause a deterioration in living conditions, but also exclude the possibility of watering green spaces on a personal plot.

In most cases, the problem of low water pressure in private houses and cottages is solved by installing storage tanks of various capacities, in which the liquid supplied by the pumping station will be collected in the required quantity, ensuring stable pressure in the autonomous water supply system. To ensure that the water level in storage tanks always remains constant, liquid level float switches are placed in them, which automatically turn pumping equipment on and off.

How do you know when it’s time to clean your gas water heater?

Cleaning the gas water heater is necessary if:

• The speaker does not turn on or turns off after working for a while. At the same time, it is known for sure that gas and water enter the column.
• The column's thermal protection sensors are constantly triggered. The scale layer has a porous structure and has heat-insulating properties, which interferes with normal cooling of the column.
• The efficiency of the column has noticeably decreased: during normal operation of the burner, the water heats up much less.
• Weak pressure at the outlet of the column with normal pressure at the inlet. Water cannot get through channels blocked by scale.

Cleaning the water intake unit

The water receiving unit is installed at the inlet of the water supply system of the column, has a mesh filter to prevent clogging of the heat exchanger tubes with large particles of rust and sediment, as well as a membrane for automatic gas supply when the water tap is turned on.

• We remove the water intake unit from the column body.
• After unscrewing the connecting screws, we open the case.
• We clean the filter and rinse it with strong water pressure.
• Checking the membrane. The membrane must be flat; if the membrane has a pronounced concavity, it means that it has exhausted its service life and must be replaced. You can replace the “native” membrane of the old speaker with a modern silicone one, which has a much longer service life.
• We close the cover of the water intake unit, tighten the screws and tighten the diametrically opposed pairs of screws one by one. This ensures uniform membrane tension.

Cleaning the heat exchanger

• Disconnect the water inlet and outlet tubes into the heat exchanger. If the heat exchanger is not cleaned regularly, the fastening nuts may become clogged with scale, preventing their removal. In this case, we recommend using a special liquid, VD-40, which can be purchased at any auto store. It is necessary to drip liquid into the joints of the nuts using an oil can. You can also use “Silit” for scale. After 15-30 minutes, the nuts can be unscrewed. If that doesn't work, try tapping the nut from all sides.
• After disconnecting the heat exchanger, use a funnel to pour descaling agent into it. A solution of 100 g of citric acid per 0.5 liter of hot water is perfect for such a remedy. You can also clean the heat exchanger with nine percent table vinegar diluted with water in a ratio of one to three. But using hydrochloric acid is not recommended, as it can react with the metal from which the heat exchanger is made, which will only worsen the situation. Leave the solution inside the heat exchanger overnight.
• Drain the solution and thoroughly rinse the heat exchanger. If you do not remove the scale that has come away from the walls, it can clog the heat exchanger tubes, so we wash the heat exchanger with a strong stream of tap water. For this purpose, tubes of the appropriate diameter can be adapted.
• We put the washed heat exchanger in place, tighten the fastening nuts, having previously changed the sealing gaskets.

Removing soot and deposits

Unlike the plumbing part, you cannot disassemble the gas part of the water heater yourself; this should only be done by a specialist from the city gas service. The only thing we can do to eliminate soot is to remove carbon deposits from the burner jets.

• The jets are cleaned with thin copper wire.
• The soot is swept away with a metal brush.
• It is advisable to immediately check the column for gas leaks. To do this, you need to prepare a soap solution, which is applied to all joints of gas pipes and units. A gas leak will be indicated by the formation of characteristic bubbles at the junction. If we find a leak, turn off the gas and call 104.

The need to clean the column can be reduced to a minimum through prevention. Longer operation of the column without failures and cleaning is facilitated by the use of filters and devices to reduce water hardness.

When to clean a gas water heater

Information about the frequency of cleaning geysers is quite contradictory. Some sources on the Internet recommend maintenance annually, others – once every 6 months, and so on. The homeowner will be guided correctly by the quality of tap water and some signs indicating that the device is dirty:

• heating efficiency and pressure in the DHW line have decreased - the heat exchanger is clogged;
• the pilot light burns with a yellow or red flame (should be blue);
• the color of the fire on the main burner also changed;
• the column does not ignite and turns off on its own at normal pressure in the network.

The average interval between preventive cleanings of instantaneous water heaters is 1 year. But the quality and hardness of the local water should be taken into account. If it is saturated with salts, scale will be deposited much faster. In such cases, it is appropriate to use filter softeners, otherwise all water heating equipment will quickly become unusable.

Reasons for low water pressure

To find out exactly why there is low pressure of cold or hot water in your apartment’s taps, you should first interview your neighbors above and below, whose apartments are connected to the same water supply riser as yours. If you are the only one who has encountered the problem of low pressure, this means that the reasons for its occurrence lie in the pipeline water supply system of your apartment.

We list the most typical of these reasons:

• Clogged pipes are the most common cause of poor water pressure. Most often, old steel pipes become clogged in apartments; the inner walls are highly rough. It is better to replace such pipes with new ones to solve the problem of low water pressure.
• Another common reason for low water pressure in the taps of a single apartment is a clogged coarse filter, which must be installed in front of the water flow meters. This filter device, also called a mud filter or oblique filter, periodically becomes clogged with sand, rust and other debris, so it must be cleaned.
• Clogging of the aerator - a special filter mesh that is installed in the spout - can also lead to a decrease in water pressure in the tap. To increase the pressure in the tap in this case, just unscrew the aerator and clean it.

If not only you, but also your neighbors in an apartment building are faced with low water pressure in the taps, then the reason may lie either in a separate riser in the house or in the clogging of the entire house pipeline. In addition, the power of the pumping station has a serious influence on the water pressure in the water supply system.

Why is the water pressure not strong enough?

Let's look at the most common factors that affect the water pressure in a instantaneous gas water heater.

• Device power. To ensure that there is good water pressure in the gas water heater, you need to purchase a device of appropriate power. A gas water heater with a power of less than 8 kW can produce poor water supply. It is better to purchase a water heater whose power ranges from 8 to 10 kW.
• Presence of blockages. Any pipes through which water flows are susceptible to blockages. If we are talking about a geyser, then the problem is most often in the mesh filter, which becomes clogged with particles of lime and rust. If water does not pass through the filter well, then the pressure will be low.
• Scale formation. Scale often appears in metal containers intended for boiling water. In a gas water heater, the function of such a container or tank is performed by a heat exchanger. If the tap water is too hard, over time a layer of scale forms on the walls of the heat exchanger, which gradually makes its way into the pipes - hence the weakening of the hot water pressure.
• Consequences of technical work. This factor is associated with scale that settles inside the heat exchanger. When the water in the pipes is shut off and then its supply is resumed, a so-called “water hammer” occurs, as a result of which scale particles enter the mixer. As a result, a blockage forms in one part of the mixer.
• Preventative work. Like any other gas equipment, the water heater needs careful maintenance, one of the important components of which is regular prevention of blockages and other problems. Often the cause of poor water pressure is neglect of maintenance of the device.

Related article: Adjusting plastic windows: how to do it yourself?

How to increase water pressure for a gas water heater?

Question

The AEG geyser does not ignite, apparently due to lack of water pressure. Is it possible to install some kind of not very powerful pump to increase the water pressure?

Is it possible to call a technician from your company to fix this problem?

Vitaly.

Answer

Hello, Vitaly!

You can increase the pressure of tap water at the entrance to the gas water heater if you install a circulation pump, which is called a “water pressure increase pump,” along the section of the water movement from the water pipe to the gas water heater.

There are many modifications of such pumps from different manufacturers with different technical characteristics. You can purchase and install a pump that will increase the pressure only in your apartment, but there are also those that are designed to increase the pressure in the entire house. There are low power pumps with a capacity of 1.1 cubic meters. m per hour, and there are those with a capacity of more than 2 cubic meters. m per hour.

They can create a pressure from 8 to 18 meters. Some models are equipped with an automatic shut-off system when the speaker is turned off. Among the most popular at the moment are the following models: GL15GR-9 Taifu; GL15GRS-10 Taifu; GL15GRS-15; UPA 15–90 Grundfost; Sprut GPD 15-9A; 15WBX-12 and a lot of others.

They can provide an increase in water pressure at the inlet to the gas water heater by up to 30% compared to the water pressure in the water supply system.

Regarding the second part of your question, unfortunately, I cannot be of assistance to you. I do not represent any company, but provide visitors to my website only with information about construction, and also provide free consultations.

Interesting too

Installation of a geyser in an apartment

It must be said right away that if you have no experience in moderately complex work and no understanding of what needs to be done and what needs to be connected where, it is better to call a specialist installing geysers.

Turbocharged geysers

Turbocharged geysers are flow-type water heating devices. Turbocharged water heaters have a significant difference from traditional gas water heaters - their operation does not depend on the draft in the chimney.

If the gas water heater does not light up

A geyser is a fairly reliable water heating installation. In principle, the column is quite unpretentious in operation and, if handled correctly, works without interruption for a long period.

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Gas water heaters in the closet

A water heater is a bulky and ugly item. It stands out from the interior; you want to hide it out of sight. In this case, in the kitchen you can close it in the kitchen cabinet, but there are a number of safety requirements. First of all, the position of the column in the cabinet depends on the type of fuel combustion in the chamber - open or closed. Whatever the type of combustion, you must first provide the gas service with an installation project and obtain official permission to carry out the work.

1. Open type. It is more dangerous and requires more attention. Place such a column in a cabinet without top and bottom (false cabinet). The distance to the side walls should be at least 15 cm. It is advisable to make the facade of the cabinet lattice for good ventilation. Cover the inside with a fire-resistant coating or make the cabinet walls from non-combustible material.

Closed type. More secure, does not require large investments. This water heater is built into a regular cabinet with a top and a bottom. Closed with a simple door without bars. The distance to the walls is reduced to 3 cm.

If all rules and regulations are observed, the gas water heater in the kitchen will not pose a threat and will remain in service.

No ignition

If for some reason the column does not light up at all, you should first check the battery that powers all the electronics (including the piezo ignition system).

When operating the water heater from a built-in generator, you should make sure that the piezoelectric element is in good condition, as well as that there are no breaks in the supply wires. In addition, it is necessary to inspect the electrode (wick) for damage.

The same actions are performed when the power supply is working properly. If it turns out that the battery is very weak or leaking, you should simply replace it. If there is no clearly visible external damage, you need to check the condition of the ignition elements with a multimeter. Use it to ring the supply wires and the start button. If they are working properly, a sound signal will be heard; if there is an open circuit, the device will show an infinitely high resistance.

The same device, switched on in voltage measurement mode, checks its presence at the input contacts of the ignition element. The presence of a certain potential on them indicates that all parts are in working order, except for the piezoelectric element.