The faucet in the bathroom does not work well. Installation of a mixer for a bathroom with a shower and its independent repair. The most common breakdowns

Faucet breakdowns are caused by a lot of reasons related to low-quality materials, improper installation and many other factors.

To eliminate the causes of the breakdown, you should call a specialist or you can try to do it yourself.

Causes and procedure for eliminating leaks in a single-lever faucet

To repair a single-lever mixer with your own hands, you need to determine the reasons for its breakdown. There can be many of them, let’s look at the main ones:

mechanical damage caused by breakage of the housing or the formation of cracks in it;
formation of a gap on the seats and ball;
development on the gasket;
aerator malfunction due to rusty material;
gap on the aerator.

If the problem arose due to a broken case, you should use waterproof sealant or cold welding. The necessary parts are wiped with a rag, the damaged areas are carefully coated. However, such repairs will not last long, and soon the body will have to be replaced completely.

If the water pressure is weak, you need to remove the aerator and clean it and the mesh with a brush. The socket through which the liquid flows may also be dirty.

If the faucet is leaking, but the cause of the malfunction cannot be determined from the outside, then you need to completely disassemble the entire mechanism and look for the cause thoroughly, checking each part separately:

First, shut off the water supply, then use a screwdriver to remove the plug.
Next you need to unscrew the screw that holds the decorative cap.
Then the cartridge is pulled out - to do this, unscrew the nut with a wrench. All parts should be inspected for defects. If none are found, move on.
Having removed the faucet completely, we look at the gasket, springs, ball and rubber seal. Worn out parts should be replaced with new ones. The remaining ones are wiped with a rag to remove accumulated sediments and deposits.

One of the most common problems is debris getting trapped under the valve ball and seat. In this case, you will have to change the entire cartridge.

Causes and procedure for eliminating leaks in a two-valve mixer

The main reason for the breakdown of such cranes is their quality. The seals on the valve axle or the gasket may also be leaking. These parts can be replaced.

Step-by-step instructions for disassembling a two-valve mixer:

shutting off the water supply,
removing traffic jams,
unscrewing the mounting screws,
removing the valve axle using a wrench.

It is best to remove the plugs with a thin screwdriver so as not to damage them.

The screws must be unscrewed carefully, as they are most often subject to oxidation and are difficult to unscrew. Can be used WD-40 or a few drops of acetic acid.

The valve axle is unscrewed from the body with a wrench counterclockwise. Pulls out with fingers. For repairs, it is necessary to inspect the seat in the body so that there are no cracks on it. Then the oil seal and gaskets are changed on the faucet axle. The assembled mechanism must be rubbed with silicone-based lubricant, and then assembled in the reverse order. Next you need to install the crane axle box and clamp it with a key. Do not overtighten the mechanism so as not to strip the threads in the housing. If it is torn off, then the entire mixer will need to be replaced.

Shower switch repair

There are several types of shower switches, let's look at some of them.

Spool

The leak in such switches comes from under the handle that opens and closes the water supply.

Causes of malfunction:

Are the rubber rings on the rotary rod working or not,
the gasket on the axle box is worn out,
The axle box is twisted.

After correcting or replacing parts, the switch must be assembled and tested. Don't forget about lubrication of the switching mechanism.

Button

To disassemble this mechanism, you need to turn off the tap, remove the cap, unscrew the screw and pull out the button with the spring.

Reasons for failure:

the spring has sagged and does not hold,
Valve rings are worn.

If the spring has sagged, you should replace it with a new one or make it yourself. To do this, it is stretched and heated red-hot, after which it is dipped in cold water. After cooling, you need to heat it again for uniform hardening. You can also make a wire spring using the same method.

If the valve rings become brittle, they should be replaced. After replacement, the entire mechanism must be lubricated with Vaseline or another lubricant.

Suberic

The main problem is that the plug does not fit well to the body and leaks. It could also be:

poor rubbing,
mechanism erosion,
presence of solid particles in the housing.

In order to fix such a switch, you need to unscrew the screw, remove the handle, unscrew the nut and remove the locking ring. After a thorough inspection, the parts should be lubricated with Vaseline and assembled into place.

Sooner or later, any faucet in the bathroom begins to leak. Small leaks are not immediately noticeable, but when the leak becomes significant and a puddle appears on the floor, you need to start repairing the faucet. It is also necessary to maintain it in good condition because of the installed water meters, which will record leaks and the cost of paying for water supply will increase.

Most often, the cause of breakdown is the formation of scale or wear of plastic and rubber parts.

We will analyze their structure and repair.

Bathroom faucet design

Any mixer is a device that mixes two streams of cold and hot water into one and directs it to the tap or shower. According to the principle of operation, they can be valve, lever and sensor. The material from which a modern mixer is made can be very different - from stainless steel to silumin alloys. The best are considered to be taps made of bronze alloy or steel with a chrome finish. They are the most expensive and durable. Preference should be given to high-quality plumbing fixtures from European and Russian brands, avoiding Chinese and Turkish products. The savings in this case are questionable.

Valve valves are the most common and simple; they were installed by default in all old houses. Pressure adjustment is carried out manually for cold and hot water using axle-box taps. Older faucet models may have sealing elements made of rubber or leather, while modern ones are equipped with ceramic sealing elements - they are more reliable and durable. The advantages of such a mixer are low cost and ease of repair.
Lever faucets are becoming increasingly popular due to their unconventional design and ease of use. The operating principle is based on the operation of a ball valve inside a special cartridge made of plastic or ceramic. This valve can rotate freely and tilt to the side to adjust the water pressure. This design implies high precision manufacturing of cartridge elements to prevent leaks. During renovation, it changes entirely. This mixer consists of a body with a lid, a cartridge and an adjusting nut. Lever faucets from popular brands are very reliable, but they are more expensive than nameless ones.
Touch faucets react using a photocell built into the body. The cost of the cheapest crane of this type starts from 10,000 rubles, and DIY repairs are almost impossible. All shortcomings are covered by the original design and functionality. Mixers of this type can be found in in public places, luxury cottages and apartments.

Main reasons for failure

If we combine all the typical breakdowns, it turns out that the service life will be affected by several of the following factors:

Low-quality components and consumables, especially among Chinese manufacturers who make their faucets from soft aluminum alloys.
The use of cheap and outdated gaskets and consumables, which quickly become unusable and begin to leak water. The locking elements of modern faucets should use paronite, silicone, ceramics and fluoroplastic - these materials practically do not wear out.
Low quality hard water. Scale formation negatively affects the operation of all mechanisms. Chrome or bronze coating resists scale and corrosion well. If water with impurities is a common occurrence, you can install an additional filter at the entrance to the apartment.
Mechanical impurities in tap water that enter during the supply of water through old, worn-out pipes. This often occurs in old houses with metal pipes water supply

All this leads to leaks from under the valves, the base of the faucet, the adjusting nut, at the shower-spout junction, and low pressure of cold or hot water. How to repair a faucet with your own hands, without resorting to the help of plumbers, will be easier to disassemble for each type of tap.

A common malfunction for any type of mixer is a decrease in water pressure and deflection of the jet. Usually occurs due to severe blockage of the aerator, the nozzle at the end of the tap. Just unscrew it and wash or replace the mesh inside.

Repair of valve mixer in the bathroom

Such faucets are still often installed in bathrooms due to their simplicity and ease of maintenance. Its design is based on two faucet axle boxes installed in the housing and a “shower-faucet” switch button. The pressure is adjusted by means of a rod with a worm screw, which closes the water hole with a spool with a gasket.

There can be two reasons for leakage in this unit: due to severe wear of the worm pair and deformation of the gasket. In the first case, the malfunction can be determined by the free movement of the water pressure control valve and its large play. You can try to wind up a little fum tape, but this will not help for long, or tighten the adjusting nut, if there is one.

In the second, you will need to unscrew the axle box and visually inspect the gasket. To do this, we need an adjustable wrench, or a set of keys for 14,15,17, depending on the type and size of the axlebox.

Important! Before any work with the mixer, be sure to turn off the water at the entrance to the apartment and relieve pressure by opening all taps.

Once you are sure that the gasket is damaged, you need to remove it and install a whole one, or completely replace the crane axle box with a new one if the structure is not dismountable. You can make this gasket yourself from a piece of rubber of suitable thickness, but it is easier to buy a ready-made silicone one. Installation is carried out with the fum-tape winding along the threads and a new sealing gasket at the junction of the mixer body and axlebox. In general, faucet axle boxes of this type are inexpensive and are sold in all plumbing stores, so it will be easier and more reliable to replace it entirely.

Repairing a bathroom faucet with a quarter-turn valve has its own characteristics. This crane axlebox consists of a ceramic and rubber pair. Over time, the rubber becomes tanned from hard water and constant compression and the contact weakens - water begins to drip from the tap. It is possible to replace the entire assembly assembly, but its cost will be much higher than a regular axlebox, so we will try to repair it. To do this, remove the seal and locking washer, then knock out the rod and take out the ceramic plate. For tight contact, it will be enough to stick 2-3 layers of electrical tape on the surface of the plate - this will create additional pressure. After which all parts are washed, descaled, lubricated with silicone and assembled in reverse order. Such repairs will only last for a short time, then this element will still have to be replaced.

Features of lever mixer repair

Now let's look at how to repair a single-lever mixer. The options for a leak to appear will be as follows: at the junction of the spout and the body, a leak at the base, a leak at the control lever.

Mixers of this type are somewhat more complex and look unusual, which confuses many. It’s not difficult to figure it out; just remove the lever, and under it there will be a cap around which the control joystick moves. To remove the faucet handle, you need to unscrew the screw under the handle. By removing the decorative cap, we gain access to the cartridge, which is secured with a brass hexagon. Typically, wear of the cartridge leads to water leakage from the tap and at the place where the lever is attached.

Most often, wear of this element occurs due to wear of the protective coating on the ball. The reason for this is scale and mechanical impurities in the water. The malfunction can be determined by tight rotation of the lever, spontaneous change in water temperature, lack of hot or cold water. Such a cartridge must be replaced or sent to a company engaged in their restoration. The cost of the simplest ones starts from 100 rubles for Chinese plumbing fixtures.

Before installation seats and the thread is thoroughly cleaned of dirt and rusty deposits to ensure a tight connection. To simplify installation, there are special grooves on the mixer body that should coincide with the protrusions on the cartridge.

Another common malfunction is a leak at the junction of the gooseneck and the mixer body. It occurs due to wear of the sealing gasket.

To replace it, you will need to disassemble the mixer, unscrew the nut securing the spout, and remove it. The old gasket is now clearly visible. After which it is replaced with a new one, preferably silicone, and the tap is assembled in the reverse order.

Almost all bathroom faucets have a built-in shower switch; it can be made in the form of a button or a lever. The reason for the breakdown is the same as for other faucet components - bad water and severe wear.

If water leaks from under the switch itself, then most likely the sealing gasket has worn out or there is leakage along the threads. The repair will consist of wrapping fum tape on the threads and replacing the gasket with a new one. Sometimes it is enough to tighten the sealing nut a little to stop the leak.

Another case is when the water flow from the tap to the shower does not switch, or we see it not turning on completely. Repair will require replacing the spool gasket or replacing the entire switch if its design is non-separable.

The design of the push-button switch is slightly different. A rod with a spool at the end moves inside the axle box, which shuts off the water supply. Fixation in the extreme position occurs with the help of a lock, and the reverse movement is set by a spring. If the rod does not lock in the extreme position, then the lock is worn out and the entire axlebox needs to be replaced. If the spring breaks, the button will not return to its original position on its own; such axle box is also replaced entirely. Repairing the spring itself or replacing it with another is possible, but impractical.

You may encounter a problem such as a leaking shower hose. The first step is to replace the sealing gaskets at the junction with the mixer and watering can. If this procedure does not help and the leak persists, then you will have to replace the entire hose with a new one - it cannot be repaired.

How to extend the life of a faucet

Do-it-yourself repairs are good, but it’s better not to go through with it. Using our tips you will save money and time.

Open and close the tap until it stops, but without using excessive force so as not to damage the gaskets.
Periodically disassemble the mixer, clean off accumulated scale and rust, and lubricate moving parts.
Install a filter that traps large mechanical impurities before they enter the tap.

A leaking faucet in the kitchen or bathroom can cause a lot of hassle, including increased utility bills. If the damage is minor, then you can repair the mixer yourself. This will save time and money spent on plumbing services.

Single lever mixer

The most common type. It is a simple design where the locking mechanism is a ball or disk. Depending on this, such taps are:

Ball;
Disk.

The handle used to regulate the pressure and temperature of the water is called a flag. Therefore, the second name for such a mixer is flag.

The most common problem that owners of such a faucet encounter is that when the handle is raised, water flows out of it. This is a sign of a broken locking mechanism. Let's look at how to repair a faucet with a broken cartridge step by step:

The decorative cover is removed first. This is a flat small disk with red and of blue color. It is needed to visually determine the movement of the mixer when the water temperature changes;
The flag is installed on the body using a screw connection. The screw is located immediately under the decorative strip. Depending on the crane model, it has different shape– flat, cross, etc. The flag is carefully removed from the base;
If the faucet is old, then the screw is most likely rusty. In this state it will not be possible to unscrew it. The only thing left to do is remove the handle by force. At the same time, a plastic nozzle will also be removed from the base, which is responsible for the direction of movement and the rigidity of the flag’s movement. Remember that with such repairs there is no guarantee of 100% success;
The second decorative attachment is removed next. It acts as a cover and is installed on top of the body. It is installed using a ring nut, which in normal condition is easily unscrewed. Let's assume that the nut is rusty and cannot be unscrewed. Then the thread is simply torn off with a pipe tap or by hand. It has no constructive purpose and performs exclusively a decorative function;
Next, use an adjustable wrench to remove the ring nut;
The nut contains the cartridge. There are several protrusions on its surface - two or more. They perform the function of fixation - it is important not to damage them;
When the cartridge is removed from the mixer, you can tell from it whether it is suitable for subsequent work or not. If cracks, nicks, roughness are found on the surface of the part, or it does not hold tightly enough, the cartridge is replaced;
There is another option: in old faucets, corrosion can damage the internal mechanism of the faucet (the place where the cartridge is installed). Functionally, there are 3 holes for water passage and two or more grooves for installing a cartridge. In this case, repairs are impractical; it will be cheaper and faster to simply replace the mixer;
After installing a new cartridge, the mixer is assembled in the reverse order.

If the problem is the opposite, that the water flows under too little pressure, the aerator is clogged. An aerator is a metal mesh at the outlet of the faucet. It serves to spray a continuous stream of water into thin streams, filtering solid residues (lime, rust).

How to clean the faucet aerator step by step:

Sometimes, instead of specialized compounds, even a simple dishwashing detergent is used. But it only works in hot water. Similarly, you will also get rid of scale and sediment on the shower aerator using hydrogen peroxide or ammonia alcohol.

Despite the fact that nowadays you can very easily repair any equipment in workshops or call a specialist to your home and he will fix it for you washing machine or refrigerator. But for some reason, many try to cope on their own and carry out minor repairs on their own. It will be much cheaper if you do the renovations in the apartment yourself, or fix the car yourself. For such craftsmen, installing plumbing will not be difficult.

All equipment has its own service life, so the question of how to fix a bathroom faucet may arise for everyone sooner or later. Until recently, all this equipment was of almost the same design, but now there is such a variety of models that sometimes even experienced craftsmen find it difficult to repair it.

Mixer designs

In order to try to fix a dripping faucet yourself, you need to know how it works. Nowadays there are a variety of designs on sale, which differ in the method of fastening and the water supply mechanism. Therefore, mixers are:

two-valve;
single lever;
sensory;

All of these varieties can be mounted directly to the wall, sink, and there are also floor-standing faucets. may differ slightly depending on what variety it belongs to. Since valve and single-lever devices are most often purchased, we can consider them in more detail.

Two-valve mixers are the simplest and most common. The mixing process and regulation of the water jet are carried out manually. This equipment has its own characteristics:

to attach it, you need eccentrics;
the distance between the eccentrics is at least 15 centimeters;
there are two axle boxes in the body - for water of different temperatures;
handles with which the process of mixing water is started.

All these faucets have rubber gaskets in their design, which quite often and quickly begin to malfunction.

Single lever faucets are gaining popularity in Lately. Here you have the opportunity to independently control the water temperature and its pressure with just one movement, which is quite convenient. Such devices have:

a lever that is installed on the fixation screw;
cartridge.

What can break in such equipment is the cartridge. Replacing it with a new one will not be difficult.

Causes of malfunctions and solutions

If you're tired of listening to the sound of dripping water, then it's time to start replacing it, or at least. If you are one of the people who are able to do something with their own hands, then this process will not seem too difficult for you. If you know how to fix it, you won’t have to buy a new one and spend extra money. But first you need to determine the cause of the malfunction, and there may be several of them:

crack on the body;
worn out gaskets;
cartridge clogging;
clogging of the aerator;
blockage in the pipe.

If, upon careful inspection, you find a crack in the mixer body, then sooner or later it will still have to be replaced. You can delay the purchase of new equipment for some time if you use sealant and cover the crack with it.

Gaskets fail quite often because they simply wear out. They are easy to replace by purchasing them in advance at any plumbing store. The gasket has been changed and water is still dripping, which means it’s time to pay attention to the cartridge. A sign that may indicate its failure may be a loud hum when the water is turned on or strong vibration of the faucet. The process of mixing water is disrupted, and when taking a shower it becomes difficult to make it at the desired temperature. Debris can get into its design, which prevents it from working properly.

To replace the cartridge you need to:

turn off the water;
disassemble the mixer;
remove the plug. Unscrew the screw under it with a screwdriver very carefully, otherwise you can damage the thread;
remove the handle;
pull out the old cartridge, carefully unscrewing the nut, it can be easily damaged;
install a new one;
Reassemble the entire structure in reverse order.

It is worth considering that when going to the store for a new cartridge, you need to take the old one with you so that you do not have to go several times. Do not forget to buy a filter for cleaning, since coarse particles in the water can easily damage it. Since cartridges come in ceramic and ball types, you should pay attention to the first option; it is more durable, although it costs more.

If this was the whole point, then we can assume that you have dealt with the problem. There are times when in the kitchen water flows under normal pressure and the stream is powerful, but in the bathroom it barely flows, then most likely the problem is that the aerator is clogged. If when you unscrew it the stream is excellent, then it is his fault. It is better to replace a part that is too rusty with a new one, and just rinse the part that is simply clogged well. If all your troubleshooting efforts have no effect, then you need to pay attention to the possible blockage in the pipe or water hose.

The most common type of faucet is the valve type; it is more practical when used with chlorinated water. But it can also fail at any moment. Even a non-professional can repair a ball mixer, although at first glance it doesn’t seem so at all. Most often, in these structures, there are dents or gaskets become unusable.

Your actions should be carried out in this order:

unscrew the handle and nut;
take out the ball and gasket;
replace all failed parts;
check seals with springs;
assemble the faucet and put it in place.

When the faucet is combined with a shower, the problem may lie in leakage at the junction of the watering can with the hose or where the shower and spout modes switch. In order to repair the shower mixer, you will have to replace the hose itself or the gaskets at the switching point. What to do:

Unscrew the clamping nut with pliers;
remove the gasket and install a new one;
remove the old winding and wind some FUM tape;
screw the hose nut back on.

Leaking faucets

The most common problem that owners of both the most modern and conventional faucets may encounter is leakage. This process will entail not only an increase in water charges if a meter is installed on it, but also nervous irritation due to constantly falling drops. It must be remembered that it will be possible to eliminate a faucet leak if you correctly determine the location of its origin. To do this, you need to inspect the tap; leaks occur in the following places:

where the hose is connected;
near the water hole;
at the base of the tap.

Dealing with this problem is quite easy if you have the necessary tools, a little time, desire and a minimum of skills. The very first thing you should do is shut off the riser so that your neighbors do not become victims of failed repairs. If a leak is detected in the place where the hose is connected, then the gasket must be changed. To do this, unscrew the hose, inspect the unit and replace the damaged part. If there is leakage from a faucet or mixer, you will have to change the faucet axle boxes. They are most often ceramic or rubber. The first option is more practical. To carry out this process, you must:

use a screwdriver to remove decorative parts from the faucet handles;
unscrew the screws and remove the valve axle boxes using a wrench;
put in the serviceable parts and screw everything back on.

If it leaks at the base of the tap, you can use sealant and tow. It is necessary to wrap the part counterclockwise and apply sealant on top.

Nowadays, people who can fix any problem in the house with their own hands are respected. Plumbing fixtures often break down, and if you know how to fix them, you may not need to replace parts. But, when going to the store for new equipment, do not forget that your savings when choosing a design and brand can lead to troubles not only for you, but also for your neighbors below. In pursuit of cheapness, most likely you will purchase a low-quality product, and soon you will have to go shopping again. Only by listening to the competent advice of a specialist can you purchase a high-quality mixer that will last a long time and without failures.

Thanks to the wonderful film “Afonya,” replacing a gasket in a faucet has become an almost anecdotal situation. Despite all the achievements of civilization, if a faucet leaks in the kitchen or bathroom, it is sometimes simply unrealistic to wait for qualified help from a plumber from the management company. But if the faucet is leaking in the house: how to fix the plumbing equipment yourself? This is not the most difficult task. You need to find out the cause of the problem and fix it using a simple set of tools.

Preparation and necessary tools

The first rule of any plumbing repair is to turn off the water supply. Valves can usually be found in the toilet; the levers simply need to be turned 90 degrees. If the equipment has not been used for a long time, the valves may become blocked. It doesn't take any heroic effort to turn them. This way, you can simply rip off the tap and then instead of one problem you will have to solve two. Valves should be developed carefully, gradually increasing the effort and adding lubricant drop by drop.

Only after the water supply is securely shut off can repair work begin. First you need to prepare the necessary tools so that they are at hand:

adjustable wrench;
flat screwdriver;
crosshead screwdriver
wrench, etc.

Usually this simple set is quite enough. Will not interfere auxiliary elements, for example, pieces of rubber or leather for making new gaskets, fluoroplastic sealing tape, which replaces liners, rags, sponges, detergent to remove dirt accumulated inside the mixer, etc.

Advice. To prevent an accidentally dropped tool from damaging the sink or bathtub, it doesn’t hurt to put something soft underneath: a rag, a piece of foam rubber or other material suitable as a shock absorber.

The reasons why a faucet is leaking can be very different. For a traditional two-valve faucet, the most actual problem Sometimes the gasket or liner wears out and needs to be replaced. If a ball (or hinge) valve, which is designed fundamentally differently, leaks, completely different actions will be needed.

Repair of two-valve tap

Replacing the gasket

The answer to the question: why does the faucet leak, no matter how tightly it is screwed on, most likely sounds like this: the problem is a worn-out gasket. Replacing it is not difficult, to do this you need:

Unscrew the valve body (simply rotate it counterclockwise).
Remove damaged or worn gasket.
Make a new gasket from a piece of thick leather or rubber. Of course, they take the old gasket as a sample.
Install a new gasket.
Wrap the seal around the stop edge.
Reinstall the valve body by turning it clockwise.
Using a wrench, tighten the installed valve tightly.

In order not to bother with making a gasket, you can buy a new one at a plumbing store. However, if for some reason this is not possible, a homemade part is quite suitable for urgent repair of the crane.

The diagram shows in detail how to properly replace the ceramic gasket in a traditional two-handle faucet. You will need a Phillips screwdriver and a wrench

Replacing the sealing insert of the oil seal

Wear of the oil seal insert can also cause a leak. In this case, a leak is observed when the tap is open: water enters between the gland nut and the valve stem. To correct the situation, you need to:

Using a screwdriver, unscrew the oil seal nut.
Make a sealing liner from recycled plastic sealing tape.
Remove the worn liner.
Wind the new insert tightly onto the valve stem.
Tighten the nut.

If everything is done correctly, the valve will turn smoothly and the leak will stop.

Replacing the O-ring of a shower hose

When a leak occurs where the faucet and shower hose connect, the problem is usually caused by a worn O-ring. To replace it, you must:

Using an adjustable wrench, unscrew the shower hose. This must be done carefully, otherwise you can easily damage the hose threads.
Remove the worn seal.
Install a new O-ring.
Reinstall the shower hose.

If possible, it is best to use an O-ring made of silicone. Rubber parts are less resistant to wear and therefore are not as durable.

Most often, to eliminate a faucet leak, you have to replace the rubber gasket or part of the locking mechanism - the faucet. These parts can be purchased at a plumbing store.

When, when switching the water supply to the shower hose, a small amount of water continues to flow out of the tap, you should change the shut-off elements located in the mixer handles, they are called faucets. They can be ceramic or equipped with a rubber gasket; the appropriate model must be selected at a plumbing store.

Ball valve repair

New-fashioned ball valves are somewhat more complex than traditional valve models. So, what should you do if the ball valve is leaking? Most often, the problem is that dirt has gotten inside the housing and interferes with the operation of the mixer.

When repairing a ball valve, you must carefully remove the valve. To do this, first remove the decorative plug, under which there is a fixing screw.

In short, the faucet needs to be disassembled, cleaned and reassembled. They do it like this:

Use a screwdriver to unscrew the screw that secures the lever.
Carefully remove the lever from the tap.
Use a screwdriver to unscrew the threaded screw.
Remove the mixer dome and plastic seal.
Inspect the seal gasket and remove accumulated deposits.
If the seal is worn out, you need to purchase and install a new part.
Remove and inspect the ball. If it is damaged, it will also have to be replaced with a new one.
Using a thin screwdriver, carefully pry off the seals that secure the ball. If they are even slightly worn, they will also need to be replaced.
After replacement, lubricate the seals with the composition recommended by the manufacturer.
Carefully reassemble the mixer in reverse order.

All procedures when cleaning a ball mixer must be carried out carefully, since its parts are easily damaged. If all steps are completed correctly, the leaks will stop. In the same way, problems with temperature control in mixers of this type are eliminated.

Sometimes you just need to change the faucet cartridge. This procedure is described in detail in the video:

What if a completely new faucet leaks?

If the question arises of how to fix a leak in a faucet that has just been installed, then the problem, as a rule, is a manufacturing defect. In this case, there is only one procedure: you need to dismantle installed mixer, go to the store where it was purchased and get the damaged equipment replaced.

Only a professional plumber can eliminate manufacturing defects at home using improvised means, and even then not always. In all other cases, with sufficient patience and perseverance, the independent elimination of a leaking faucet is completed quite successfully.