Water flows poorly from the faucet (from the tap) - why does the water flow poorly?

When water flows poorly from a faucet, you can only deal with the problem by knowing what caused the poor pressure. Weak pressure prevents you from fully using the shower or bath. Problems with water significantly reduce the comfort of living, making it impossible to fully enjoy the benefits of civilization.

Reasons affecting water pressure in the tap

To eliminate a malfunction that leads to a loss of pressure or its complete absence, you need to understand why the water from the tap is not flowing well.

Most often the problem lies in the following circumstances:

Faucet clogged. A decrease in pressure and a decrease in water flow occurs due to clogging of the aerator, which is an insert and filters water. Confirmation of this theory of breakdown is such a violation as a decrease in pressure in only one mixer, when other taps in the house are working normally.
Formation of a plug of rust, silt particles and scale in the pipe. A gradual decrease in pressure in this situation can lead to complete blocking of the throughput diameter of the connecting filter or the pipeline fittings themselves.
Reduced water supply pressure in the water main. The problem may be at the pumping station level. Depressurization of the pipeline is also possible.
Incorrect calculations when designing a water main. For example, during installation, pipes of a larger diameter were used than those used on neighboring branches; large length of water pipes, which does not correspond to the capabilities of pressure equipment.

A drop in pressure of both hot and cold water can be caused by factors such as the simultaneous consumption of liquid in large quantities. As a rule, under such circumstances, water does not flow well in the evening, when the bulk of the area's residents return home.

Water supply pressure standards

Official documents SNiP 2.04.01-85 and SNiP 2.04.02-84 determine the optimal water pressure in the pipeline. In houses less than 10 meters high, 1 atmosphere is considered an acceptable value. If the building exceeds 10 meters, the permissible pressure will be considered 2 atmospheres or more.

Pressure standards:

cold water - 0.3–6.5 atmospheres;
hot water - 0.3–4.5 atmospheres.

Measurements are carried out at the water intake point during the morning (from 7.00 to 9.00) or evening peak hours (from 19.00 to 22.00).

If the indicators in a residential area do not meet the requirements of the documents, it is necessary to find out the reason and, if necessary, contact the responsible authorities.

Solving pressure problems

If the pressure drops or the water does not flow at all, you can try to find out the cause of the problem yourself and then fix it. It is worth noting that not all breakdowns can be repaired yourself. In case of accidents at the station, depressurization of the pipeline and similar reasons, repairs are carried out by the relevant competent services.

You can try to clean the clogged section of the pipe from the riser to the valve with a special cable. When water does not flow well from the neighbors below and above, it can be said that the riser is clogged. It is almost impossible to clean it. It must be replaced.

All repair work is carried out after the water is turned off.

If the tap itself is clogged, the mixer can be cleaned. To do this you will need an adjustable wrench. Use it to unscrew the aerator. Due to the fact that the aerator has small nozzles, it clogs quickly. To clean the aerator, you need to place it under running water and rinse it. When the problem is not in the aerator, you will need to dismantle the valve and unscrew the lock washer that holds the locking element in the housing seat, and get to the axle box and remove it. Next, the body is cleaned of scale, plaque, etc. When everything is finished, you will need to reassemble everything in the reverse order.

If the problem appears in the shower and after cleaning the faucet there is still no hot water, you will need to clean the sprayer. It is dismantled using an adjustable wrench, after which it is placed in a pan and filled with water, and then placed on the stove. You need to add vinegar or citric acid to the water. No need to boil. An acidic environment has a destructive effect on plaque and other deposits that have formed on the sprayer. After cleaning, the sprayer should be rinsed under running water and returned to its original place.

If the problem is not in the mixer, but in the water pipes, then it is better to contact a specialist (fitter, plumber).

In order to fix the problem of poor water pressure yourself, you will need:

turn off the water;
remove the coarse filter plug;
remove and wash the wire cassette.

The filter element is returned to its place and the plug is screwed in using a special tape for sealing. If the reason was not a clogged coarse filter, we can assume that the failure of the fine cleaning system is to blame.

After disconnecting from the water supply, you need to check the pressure in the free pipe. To do this, you need to open the central valve slightly. If everything is normal, replace the liner and wash the filter bowl of accumulated dirt, and then put everything back in its original place.

When none of the above helps, you can try power flushing the pipes. To do this, turn off the water with the valve located near the filter, unscrew the flexible hoses or the mixer, if it is wall-mounted.

Water will flow from the pipes, which must be directed into the sewer or a pre-prepared container (basin, bucket). It is recommended to do pipe cleaning with an assistant. You will need to sharply open and close the valve for 1-2 seconds.

During the long-term operation of plumbing equipment, many problems arise related to emergency situations, low pressure, or, conversely, a complete lack of water supply. Then the question arises why hot water does not flow from the tap and what factors influence this. In fact, options for getting out of a difficult situation are determined individually for each case.

Possible consequences of the complaint

The consequences of a complaint may vary depending on where it is filed.

Based on the results of the consideration of the complaint, the management company must eliminate the problem of low water pressure as soon as possible and recalculate utility bills at the request of the apartment owner.

If a complaint about the actions or inactions of utility workers was filed with the prosecutor’s office, then you can count on the management of the management company being fined. In addition, the prosecutor will issue an order to the housing department to eliminate the problem within a specific time frame.

When filing a complaint with the state housing inspectorate, you will also have to wait for a response within thirty days. As practice shows, in most cases, inspection specialists side with apartment owners. The supervisory authority can also punish utility workers with a ruble, issue an order, or apply more stringent measures, after which the housing department will no longer be able to provide services to the population.

Requirements for the quality of hot water supply

Process water should not be ingested; it is used exclusively for domestic purposes, but despite this, the quality of the heated liquid supplied through the water main must meet all currently established sanitary standards for water consumption. Increased attention is paid to the temperature regime of hot water supply. The upper and lower temperature thresholds are set. For example, the heated water at the outlet must have at least + 60°C; it is at this level that the majority of pathogenic microbes and harmful bacteria die. The highest temperature threshold is set at + 75°C - with a higher value, it is possible to get minor burns.

Consumers should take into account that when tap water is heated above + 40°C, the carbonate hardness of the liquid increases several times. This most often leads to the formation of scale on the inner surface of the pipes, which causes clogging and premature failure.

To independently verify the quality of the hot water supply, you need to order a full biochemical analysis of the liquid flowing through the pipes. Based on the results of laboratory tests, we can say with confidence whether the water is of poor quality or, on the contrary, meets all sanitary standards.

When is well repair impossible?

There are a number of cases in which it is more expensive to repair a well than to drill a new well, for example, the strainer was initially installed incorrectly, there is no gravel filter, low water level, or the use of a whistle type design, which is designed for 7 years of service.

Reasons why hot or cold water does not flow from the tap

It may happen that the water pressure in the kitchen has decreased many times, and the liquid from the tap began to flow in a small trickle. Several reasons contribute to this process:

general condition of water pipes and riser;
clogging of the existing large flow filter cassette;
the small filter is clogged with grains of sand or rust particles;
In the absence of filters, the cause of low pressure may be the technical condition of the mixer.

Even a small crack in the faucet body can cause poor water pressure

If you have a water filter, you should keep it clean.

Poor condition of water pipes can cause a lack of hot water

Before you start diagnosing your own water supply system, you should find out from your neighbors on the riser what their pressure is? If at the moment there is poor water supply to all floors, this means a decrease in pressure in the central water supply. The surest way out of this situation would be to immediately seek help from the housing and communal services. Qualified company employees will clean the coarse and soft filters installed on the main line, remove blockages, and establish water supply on all floors. You can deal with other frequently occurring everyday situations on your own.

Mixer

Buying an expensive, high-quality faucet for a kitchen or bathroom is a serious expense, but at the same time, purchasing a cheap water tap is often the main source of water supply problems. The result of unjustified savings will be premature failure of the crane. As a result, you will have to spend additional money on repairs or purchasing new equipment.

Another common problem is incorrect installation of the faucet. This unpleasant situation can happen to beginners who are installing a water tap for the first time and are not well informed about this issue.

It should be noted that installing a mixer cannot be called a difficult job, but in any case, the installation must be carried out correctly, taking into account all the recommendations of qualified specialists. Particular attention is paid to installing complex models; before starting work, you must study the instructions offered by the manufacturer.

Water may not flow well due to improper operation of the water tap. Plumbers do not recommend tightening the water supply regulator too tightly, exposing the mixer to serious external influences and excessive mechanical stress. It is not recommended to press hard on the spout, and the valves should be rotated carefully, without sudden movements. If you do not follow the manufacturer’s recommendations during operation, the plumbing equipment will malfunction and eventually fail completely.

If the spout joint is leaking, then you should think about repairing or replacing the faucet with a new one.

If necessary, replace the mixer cartridge

Plumbing

Quite often, the cause of poor operation of the faucet is wear and tear of the plumbing fixtures. A large number of on and off cycles leads to abrasion of individual elements and the appearance of cracks or chips on the surface.

Over time, moving parts become damaged and rubber gaskets fail. The wear process is irreversible and is a natural result of the operation of even expensive high-quality products. However, it should be taken into account that structural damage associated with wear and tear rarely leads to the fact that water does not flow well from the tap; on the contrary, a process of constantly increasing leaks is observed.

Corrosion and blockages are the main problems of steel pipes

In old houses, a common cause of low pressure is the unsatisfactory condition of the water pipes. Metal products rust over time, so inside the water supply there may be a large number of small particles that form a blockage. In this case, the pipes should be purged with a special pump under pressure or the rusty water pipes should be completely replaced with new products.

The most popular today are water pipes made of polypropylene or metal-plastic. The advantages of replacement are quite obvious: plastic does not rust, is resistant to temperature changes, durable, and does not require constant painting.

Recently, metal-plastic pipes have been mainly used for water supply.

Faulty heater

If hot water flows from a cold tap, the reasons for the abnormal operation of the plumbing system may be the following:

difference in pressure supply - hot water can “suppress” cold water when there are problems with the plumbing or the equipment is not assembled professionally;
faucet breakdown - the elements of the mixer fail during operation and do not cope well with their direct responsibilities, so warm water is mixed with cold water;
installation of a shower cabin - if the installation of the product was not carried out correctly or the shower is not used correctly - this over time can become one of the main reasons for the failure of the water supply system;
installation of a water heater - water from the boiler heated to a certain degree is mixed with cold water due to improper assembly of the equipment, or the absence of the necessary valve.

Don't have a valve installed on your water heater yet? It is better to purchase it, otherwise a situation will arise when hot water flows from a tap with cold water. Sometimes the heated liquid still penetrates the heat and water supply system even when the hydraulic valve is operating. Such a malfunction is possible due to incorrect use of the heating device.

If a water heater is installed in the bathroom, problems with its operation can lead to a lack of hot water.

Users should follow the operating instructions:

Before starting operation of the water heater, the hot water supply safety valve should be closed;
after turning off the boiler, you need to turn off all the valves so that they cannot affect the change in pressure in the water supply system.

The filter or mesh is clogged

As a rule, various cleaning filters are installed on the water main. After an emergency shutdown and subsequent connection of the water supply, the pressure in the living space may become much less. This is a signal to check the condition of the filter element; perhaps it is time to clean it.

The central shut-off valve should be carefully inspected. If the external condition of the pipes causes concern, it is better not to risk it and not unscrew the filter yourself, otherwise you could flood the entire apartment.

Before cleaning the filter, experts recommend turning off the central tap installed on the water supply to completely prevent liquid leakage. After this, you need to unscrew the nut from the bottom and pull out the clogged filter. It may happen that the filter element is completely clogged with grains of sand or particles of rust.

The filled mesh must be thoroughly rinsed in a special container and then under running water. After cleaning, the mesh is inserted into the filter, and the entire structure is tightened with a nut. Instead of a gasket, experts advise winding natural flax, because paronite gaskets “stick” over time, and natural material is easy to replace with a new one.

Stages of disassembling a coarse filter

Clogged input filter

Changing the coarse filter

Now you can work on filters.

First, we will look at the condition of the coarse filter:

One nut needs to be unscrewed. For this procedure we will need Swedish women. Before doing this, take care of a container where you will need to drain the remaining water from the filter. You need to take a container such that it can be placed directly under the filter (Ideally, a cut-off plastic bottle, which you will see below, is suitable).

So, take the Swedes and unscrew the nut:

Turn it counterclockwise as shown in the picture. Swedes won't have to work for long. Next, you need to carefully unscrew the nut by hand, placing a container to drain the water:

Then the water will continue to drain for some time and you need to wait. It is even recommended to secure the container for draining, as it may take several minutes.

But finally, the water has stopped flowing and you can examine the filter from the inside:

We see with you not a very good picture. First of all, the inside is completely rusty. Secondly, the filter contains a replaceable mesh. It needs to be removed:

What to do next? In a good way, it is better to replace the mesh (buy a new one). The rust inside the filter needs to be washed off. If there is a lot of rust, then it is worth replacing the filter itself. You may ask, how to clean if the water is turned off? Everything is correct, you need to stock up on cold water in advance and dilute it with hot water, which is not turned off for you. In general, you can handle it.

And this is what the new mesh for the coarse filter looks like:

install it in the filter and screw it back onto the pipe.

Reasons for lack of hot water

Malfunctions of the hot water supply system are becoming a big problem for residents of comfortable apartments. In fact, all problems are similar to defects that occur in a cold water supply system, but in addition to this, individual features are added:

temperature changes - the cause may be blockages formed in the lower part of the risers or air pockets in the upper section;
emergency leaks - today all communications are closed with special plasterboard structures, so small leaks of liquid are often unnoticeable;
defects and corrosion - the main factors influencing the formation of corrosion inside communication pipes are increased fluid temperature and the presence of oxygen.

Of particular concern is the failure of the hot water system, namely when hot water does not flow from the tap. As a rule, this is a short-term phenomenon that arose as a result of a scheduled inspection or emergency repair work; upon completion, everything works as usual. But there are situations when the water supply has been disrupted for a long time, in which case it is necessary to urgently take action: find the problem yourself or contact specialists.

Shut off the riser and drain the remaining water

First you need to turn off the cold water. To do this, close the ball valve on the cold water riser. How to do this is described in detail in the article: Turning off risers in an apartment is easy. And here I will give just a picture:

Cold water is turned off. Now you need to drain the remaining water in the pipes. There is a drain valve located directly below the self-cleaning filter. Some people have a hose leading out of it that goes straight into the drain pipe, while others have just a faucet:

If there is a hose, then simply open the tap and drain the remaining water. If there is no hose, then you need to find a bucket or basin and place it under the tap, then open the tap and drain the remaining water.

What is the reason for the failure of the DHW system?

There are several answers to the question why hot water flows from a cold tap:

lack of shut-off valves;
sudden changes in pressure;
breakdown of working parts of the crane;
improper installation of equipment;
violation of operating conditions.

The most common negative phenomenon is the periodically occurring pressure difference in the water supply. It should be noted that the pressure in the hot water supply system is much higher, and after a blockage has formed, the difference increases many times, compression occurs in the water supply: the liquid heated to a certain temperature, penetrating into the adjacent riser, begins to replace the cold one. Distortion of the direction of flow will help prevent the check valve - the main safety element of the system.

Housing and communal services specialists can draw up a report on non-compliance of water temperature with standards

If the need arises, you can independently diagnose the water supply system and discover the reason for the change in the flow of hot water. If there is a warm pipe near the cold water supply valve to the apartment, it means that there are problems in the common riser, you need to call a specialist. Otherwise, the source of the problems will have to be looked for inside the apartment.

The first step is to check the serviceability of the water tap, the degree of wear and operating conditions. If everything is in order with the plumbing equipment, you need to examine the condition of the shut-off valves in the attic of a residential building in the basement. Particular attention should be paid to the cold water valve; if it is working properly, only cooled liquid should flow from the tap.

If the plumbing works uninterruptedly and there are serviceable check valves in the house, we can say with full confidence that the source of the problems should be sought from the neighbors in the riser. You should not independently diagnose the circulation of hot or cold water throughout the entire entrance. Carrying out such work requires some experience and good knowledge of plumbing equipment.

A special faucet attachment with a thermometer will help you monitor the water temperature.

Video

When using plumbing equipment, a problem may arise such as a lack of water or constant leaks. Why water does not flow well from the tap, how to deal with it and what repairs are required - it all depends on the reason why the equipment broke down. There may be several such reasons; in the most difficult cases, you simply need to replace the faucet with a new one.

The lack of water in the mixer usually indicates a breakdown.

Causes of breakdowns

Choosing a faucet that is too cheap and of poor quality is often the reason why there are leaks or problems with the water supply to the consumer. It must be remembered that savings in this case usually result in additional expenses for repairs and the purchase of a new crane. Problems with plumbing may result from improper installation of equipment. Usually this situation arises among beginners when they have neither experience nor knowledge for this. Of course, installing a crane is not the most difficult job, but it also needs to be done correctly, in full compliance with all standards. This is especially true for complex models, when installation is carried out according to special instructions.

Improper operation is another reason why water does not flow from the tap. Incorrect operation, valves that are turned too tightly, mechanical loads and shocks that are not at all intended for such equipment lead to its failure. You cannot press hard on the spout; the same rule applies to valves, which must be moved smoothly and carefully.

The cause of faucet breakdown is often wear and tear of its parts during operation.

If you do not follow the basic rules of use, the water will simply stop flowing, there will be interruptions in supply or constant leaks, which also does not add comfort to use.

Often the reason that a crane simply does not work is due to natural wear and tear of the equipment. A large number of on/off cycles leads to abrasion of individual parts, the appearance of chips and cracks. Over time, moving elements become damaged and gaskets fail. Sooner or later, this situation is typical even for expensive and high-quality models. But such wear and tear rarely leads to the fact that water stops flowing; usually, on the contrary, there are constant leaks that increase over time.

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Plumbing service

Design of a two-valve kitchen faucet.

If the water does not flow or the faucet is leaking, then it is necessary to begin repairing it. What to do first? First, you need to understand the causes of the phenomenon, and then begin the appropriate work. To avoid such situations, experts advise adhering to the following rules:

When choosing a mixer, preference should be given not to the cheapest or most expensive, but to the most convenient to use, high-quality in assembly and appearance. Often, expensive faucets cause many problems with their home use; water may simply not flow due to the fact that the pressure in the water supply system is not suitable for such a model.
The equipment must be installed by a specialist. This will ensure reliability and no problems.
The equipment must be used correctly. Its service life depends on the conditions and how the crane is used.
Availability of preventive examinations. Faucets, like other plumbing equipment, require regular inspection, cleaning, replacement of gaskets and other parts. Without this, they will quickly fail.

To fix the problem and repair the faucet if there is no water in it, you need to prepare the following materials and tools:

crane axle boxes (in case you have to make a replacement);
set of keys, adjustable wrench;
special set of screwdrivers;
various gaskets (if the exact size is known, then you need to take that one);
silicone-based seals;
drill, set of attachments.

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Repair work

Single lever mixer diagram.

What should you do if the taps are leaking or there is simply no water in them? There can be several sources of problems:

water drips even when the tap is closed;
water leaks out in a trickle when the valve is completely closed, and over time it only increases;
When the valve is open, water simply does not flow through the tap;
moisture seeps through visible damage to equipment.

Once the source of the problem has been identified, the water must be turned off. It is recommended to immediately turn off not only cold but also hot water, since you will have to remove the mixer. The equipment is then carefully disassembled so that repair work can be carried out.

For example, if water just starts to leak, then the reason is a loose fit of the valve-axlebox or complete wear of the rubber gasket. Changing the gasket is very simple, it takes literally a couple of minutes, including disassembling and assembling the tap. In a ceramic faucet, you will have to seal the silicone seal; for other models, a complete replacement will be required.

If the water flows in a trickle, then you also need to replace the faucet axle box, whose edges are simply worn out. But this problem is often caused by the mixer not being used correctly. The valve should not be tightened too tightly when closing, as this will quickly erase the edges and require repairs quite often. If the faucet shows severe damage in the form of cracks, then it simply needs to be replaced. Repair in this case will be a simple waste of money and time, water will leak. If only the valve is damaged, then it can still be replaced, but it is better to immediately buy a new body.

If water simply does not flow from the tap, but still flows to the mixer, then the reason may lie in a broken faucet or a gasket that is bent and does not allow water to enter the spout. This problem is solved depending on the breakdown. If the gasket is bent, then you just need to remove it and replace it with a new one. If the crane axlebox is broken, then it must be carefully dismantled, a working one must be installed, and the functionality of the crane must be checked.

In rare cases, a complete replacement of the faucet is required. This usually happens if it is completely out of order and cannot be repaired. Experts advise replacing it if the equipment is old and leaks and other problems are often observed. You need to choose taps and mixers that are most suitable for specific conditions. Today, manufacturers offer the widest range, so there should be no problems with the choice.

When water flows poorly from an installed faucet or there is simply no water, you need to figure out what caused the malfunction. After this, you can begin the appropriate repairs, the complexity of which depends on the scale of the damage. In rare cases, it may be necessary to completely replace the faucet, but this usually does not happen.

The water from the tap is not flowing well

Low water pressure flowing from the tap is an unpleasant problem for comfortable living in an apartment. The reasons may be different. In some cases, you can handle it yourself, and in some cases you will need the help of a specialist or contact the management company that services your home.

Reasons for low water pressure:

clogging or wear of the mixer aerator;
clogging or wear of the mixer itself;
clogging of supply flexible hoses;
pipeline clogging;
clogging of pipeline filters;
reducing water supply pressure in the water supply system;
depressurization of the pipeline, i.e. his breakthrough;
improperly designed piping system.

Eliminating weak water pressure from a tap Fixing low water pressure with your own hands:

A clogged or worn faucet aerator
is a minor problem. Unscrew the aerator from the faucet gander. We wash and clean the aerator mesh from plaque and debris. If the mesh is rotten, it needs to be replaced with a new one. The aerator mesh needs to be washed once every 2-3 months. It has small nozzles and therefore clogs quickly due to poor water quality. If the problem does not disappear, then check further.
Clogged and worn-out faucets
are also a common cause of low pressure. If the water flows poorly only in one place in the apartment, but the pressure in other faucets is good, then the problem is probably only with this faucet. It is necessary to turn off the water. Next, disassemble and clean the internal parts of the mixer. And also replace worn parts. There may be a problem with the sprayer in the shower or in the bathroom. The holes in the sprayers become covered with limescale and water cannot flow with the required pressure. Limescale deposits are easily removed with acid. Place the sprayer in a plastic bag with a solution of acetic or citric acid and secure the bag with electrical tape or tape for several hours. After the procedure, rinse the sprayer. It will be like new.
Clogging of supply flexible hoses
is also easy to eliminate. You need to disconnect the hoses using an adjustable wrench or wrench. And rinse them. Next we deal with the pipeline itself.
Clogging a pipeline
is a more complex operation. Cleaning is carried out with a special cable. Old metal pipes accumulate a lot of rust, which can also cause low water pressure. After cleaning, you need to place a bucket under the outlet of the pipe and turn the water on valve so that all the dirt flows into a separate container. If the reason is a clog in the common water riser, then this can only be solved by replacing the clogged section of the pipe with a new one.
Clogged pipeline filters
, if any, are also a common cause of low water pressure. Filters come in coarse and fine filter types. We turn off the water. Remove the plug from the coarse filter flask using an open-end or adjustable wrench. Remove and wash the mesh filter. If it is worn out, then we replace it with a new one. We put everything back together in reverse order. And we move on to checking the fine cleaning system. Disconnect it from the water supply, change the liner and rinse the filter glass from dirt. Also reassemble the filter in reverse order.
A decrease in water supply pressure in the water supply system
is already an external reason. If your neighbors also have low water pressure, then you need to call the management company and report the problem.
Depressurization of the pipeline
, i.e. A pipeline breakthrough can also only be resolved by a management company.
An improperly designed piping system
can occur if you always have low water pressure. This issue also needs to be resolved with the management company.

Constant and timely maintenance of plumbing fixtures will minimize the occurrence of such problems.

What should residents do and where should they go?

According to Government Decree No. 354, paragraphs 105, 106, if a violation of the quality of a utility service is detected, a citizen must report this to the emergency dispatch service of the contractor or another service indicated by the management organization. Information can be transmitted in writing or orally and is subject to mandatory registration.

When contacting, the consumer is obliged to provide his full name, the exact address of the premises where the problem was discovered, and the type of such utility service.

After the communications have been inspected, the reason for the decrease in water pressure in the tap has been determined and a report of the work performed has been drawn up, the consumer can contact one of the organizations involved in regulating water supply issues:

The management company (MC) must monitor the functioning of the in-house plumbing equipment.
The fuel and energy complex supplies hot water.
Vodokanal is responsible for cold water supply.

In an apartment building

You should complain about poor water pressure to the following organizations:

If a citizen has purchased a new home, in which the pipeline layout turns out to be incorrect and the water does not flow well into the apartment.
In this situation, you need to contact the developer through the management company, housing office or homeowners association. Perhaps the organization will accommodate you and fix the problem. It all depends on the integrity of the legal entity. If, when signing the acceptance and transfer of housing, the buyer indicated that he inspected the property being purchased and did not find any problems, then the developer may refuse to carry out repairs in the drainage system.
If common house equipment breaks down, you can contact the management company, housing office, homeowners association - the organization that manages the house, with which an agreement has been concluded for the supply of services.
The cause of the malfunction was discovered in the main pipeline - this issue is under the influence of the water utility. In this case, you must send an application to the management company and ask to transfer the complaint to the organization that supplies water.

In a private house

Residents of the private sector, if they have problems with low water pressure in their home, have the right to complain to the service provider, from whom they receive bills for water supply.