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Any residential premises, be it an apartment or a private house, necessarily produces one or another amount of household waste. Current standards set the amount of wastewater per person per day, which reaches 180 liters. To drain such a quantity of wastewater, it is necessary to use gravity sewer systems, to which plumbing fixtures are connected.
From local horizontally installed pipelines, wastewater flows to a vertical sewer riser connected to the central sewerage system. Plumbing, horizontal drainage and a vertical riser are combined into an in-house sewerage system. According to standard project, the riser usually goes to the roof and is not closed with plugs.
Application of ventilation valves
In the construction industry, situations often arise when it is simply not possible to vent the riser to the roof. Without this, the operation of the system is impossible, and something needs to be done in this situation, because a system in which water hammers constantly occur and odors enter living quarters cannot be considered high-quality and reliable.In such cases it comes to the rescue ventilation valve for sewerage, which is installed on the top of the riser. Ventilation valves owe their invention to the inhabitants of Scandinavian countries.
In constant frost conditions, the outlet channels of the risers froze, and there was no contact with the atmosphere. The result was disastrous: the entire building was literally saturated with unpleasant odors, and the lack of air in the system during rarefaction was not compensated for by anything.
Ventilation valves for sewerage can solve such problems without any problems. A typical valve is designed with a movable diaphragm that can sense pressure in the pipeline. These devices allow you to forget about the need to bring the riser to the roof. Not only can the riser be led into the attic using valves, but it can even be placed in separate rooms, where the plumbing is installed (read: " ").
Principles of sewer system ventilation
The riser output channel is vital for the system so that all devices connected to it work properly.It is much easier to explain the need for good ventilation system, if we consider the basic principles of its operation:
- Discharged water from plumbing fixtures enters the riser.
- Once in the riser, the water begins to draw in air, creating a resolution or negative pressure difference. This is especially important when draining large volumes of water, since in this case there will not be enough air in the system to stabilize the pressure. The magnitude of the rarefaction will be so great that its value can safely be called critical.
- The appearance of negative pressure causes water to enter the pipe from the weakest water seal. This process is called breaking the water seal, because in order to equalize the pressures, air must appear in the system - but there is nowhere for it to come from. The only place is the sink, since the resistance in these areas is always less. As a result, air is drawn into the system from the siphon, thereby destroying the water barrier.
- Then everything is clear: the water sucked out of the siphon valve allows sewer odors to enter the living space. Of course, they take this opportunity and enter the house, thereby disturbing the peace of the residents. Considering the fact that some sewer gases can be toxic or explosive, it becomes clear that their occurrence must be avoided.
Ventilation valve device for sewerage
The design of the ventilation valves assumes the presence of a side window equipped with a mesh that prevents small insects from getting inside. The thermally insulated housing contains the main working element of the device - the diaphragm. In addition, the device may include a gasket cuff and an adapter, which allows the valve to be mounted on a riser of any diameter (or a limited range of diameters). The cuff makes it possible to increase the tightness of the device.
To make a ventilation valve for sewerage, a certain amount is required synthetic materials. There is a membrane on the inside of the housing that does not react in any way to positive or neutral pressure. Read also: "".
The operation of the valve begins at the moment when negative pressure arises in the system: the vacuum acts on the membrane, opening it, and air enters the system. When the pressures on both sides of the valve are equal, the diaphragm closes automatically.
As long as the pressure in the system is stable, the diaphragm is in closed position and prevents odors from entering the room. That is, the valve not only equalizes pressure in critical cases, but also monitors its changes in the background. The sewer vent valve also plays a certain role in matters of pipeline clogging. If the system is clogged, then after draining the air leaves the riser, which creates positive pressure. Naturally, the membrane remains closed, so air begins to escape through the sink, pushing water and dirt out. After the system has stabilized, the water will go back into the siphon and the water seal will be restored, but the dirt from the sink will not go away, and this is a direct confirmation that it is time to clean the pipeline.
Rules for using the ventilation valve
There are basic rules, the implementation of which will enable the valve to perform all the functions assigned to it:- Air valve must be airtight even at low pressures. If the building contains no more than 4 residential premises or 3 floors, then an additional valve is not needed. Of course, in order to remove the calculated volume of drainage, the riser pipe must be thicker than the thickest one horizontal pipe so that there is enough air in the system to compensate for the vacuum.
- In order for the ventilation valve to work properly, its performance must be higher than the established standards. Valves are used in cases where there is no riser outlet to the roof, so they must be as powerful as possible to maintain required pressure in the system all the time. As a rule, about 32-47 liters of air per second are passed through if the negative pressure reaches 250 Pa. Of course, the more valve power exceeds design, the better for the entire system.
- Working conditions in multi-storey buildings are quite complex, and in this case the valve performance must be even higher. The same is said in all construction regulatory documents. If we reduce this information to one rule, it turns out that the valve capacity must be at least five times greater than that of the riser. In addition, when installing ventilation in the toilet of a private house, the height of which exceeds four floors, special rules for creating a ventilation system are used.
- The use of ventilation valves is determined big amount regulations. For example, in design modeling, the capacity of air valves is a parameter that must be included in the calculations. The valve parameters are directly related to the volumes of wastewater that the sewer system will have to process: the larger they are, the greater the power the device should have.
Combination devices
In addition to separately produced valves, there are also versions of siphons in which the air valves are built initially. Such designs protect the system from the occurrence of negative pressure, regardless of whether a valve is installed in the attic or not. There are no differences in the design of the built-in valve, and it works on the same principles, opening the diaphragm before the water seal breaks.Air Valve Installation
The ventilation valve for sewerage can be installed:- horizontally;
- vertical;
- under a roof or indoors.
To protect the membrane from external factors such as dirt and moisture, the valve must be mounted at least 30 cm above the topmost pipe to which the plumbing is connected. The distance to the nearest siphon should not be less than 20 cm. All this allows you to protect the air valve for unventilated sewer risers from breaking the tightness, since the problems arising from this can be extremely unpleasant.
When installing a valve in a bathroom or toilet, you should use the following recommendation and provide the room with the maximum amount of air. Experts advise carefully monitoring this point, since water has the unpleasant property of capturing a volume of air that is 25 times greater than the volume of water itself.
You can look at the design of the air valve in more detail in the photo, and then most of the questions will disappear by themselves, since visual image allows you to immediately understand how it works this device.
Conclusion
A properly installed ventilation valve on the sewer improves its operation and prevents various gases from entering living spaces, thereby disturbing comfortable living conditions. Experts agree that the ventilation valve makes it possible to solve the ventilation problem sewer system in the simplest possible way. In addition, this device is optimal solution for ventilation of houses with no more than three floors, but it can also be used in big houses: it is enough to connect several risers that have a common ventilation outlet and mount a sewer ventilation valve on it.
The ventilation outlet of the sewer system is designed to allow air to enter the vacuum zone that forms each time water is drained, eliminating unpleasant odors and noise. An air valve for sewerage can replace a classic device, a drain pipe, and does not have the typical inconveniences associated with the operation of the latter, including icing and narrowing of the outlet open air diversion in the cold season, as well as the likelihood of getting unpleasant odors V open windows Houses.
An air sewer valve is a body whose diameter corresponds to a similar pipe parameter (hence, the flow parameters in it are identical), equipped with stem or diaphragm, covering the outward-facing inlet.
At rest, the pressure existing in the pipeline keeps the rod or membrane in the closed position, “pressing” them from the inside. While the flow rate increases when water is drained, a vacuum is formed in the pipeline, the valve or membrane opens, letting in the amount of air necessary to equalize the pressure. When the parameter is normalized, the closing device returns to its original position.
Important feature: The return flow of air with an unpleasant odor from the sewer system into the living space is eliminated due to the pressure difference during the period when the hole is open. Out of the zone low pressure air cannot move into the high zone.
There are also combined models that work both for air intake and air exhaust. The installation location of such devices needs to be carefully considered; it is not always advisable to place them in a bathroom or toilet; it is possible to move them outside of residential premises or install them in a special unit.
Types of air valves
It was already mentioned above that the design of non-return air valves for sewerage can have a membrane or a rod. Such models work almost equally efficiently, however, plastic membranes are more susceptible to wear and need to be changed periodically.
- Some types of devices can only be installed on one drainage point (sink, toilet, etc.). These automatic devices have low throughput.
- The 110 mm sewer air valve can be mounted on a common riser, thus providing ventilation for several sewer pipes at the same time.
- Combined models are universal and have the advantages of products of both the first and second categories.
Obviously, local (designed for one pipe) models have a smaller diameter than those capable of providing ventilation for the entire system. In most cases, DN 50 mm models are used for these purposes.
According to the installation method, the valve (sewer aerator) can be:
- threaded,
- flanged,
- coupling
Equipment installation
An air valve for unvented sewer risers is not the only option for installing equipment. Valves can duplicate classic scheme ventilation, installed instead of or together with vent structures.
The main requirement when choosing an installation location is to maintain the ambient temperature above 0° C. This will avoid freezing and disruption of the equipment.
Height matters a lot, on which an air valve for sewerage is installed.
- If there is no drain for draining water in the floor, the valve is placed 10 cm higher than the location of the highest outlet of the plumbing fixture or water-consuming equipment.
- If there is a ladder, the valve is placed 35 cm above the floor level.
Important: Maintaining such distances protects the fan valve from contamination.
It is necessary to select the installation location in such a way that it can be easily accessed for inspection and repair. If a vacuum valve for a sewer with a diameter of 110 mm is intended to be covered with panels, plasterboard or other structures, it is necessary to provide such structures with special doors or hatches to avoid the need for complete dismantling during repair work.
The free end of the pipe or its socket is chosen as the installation location.
In some cases, it is advisable to install an air sewer valve in the attic or in a specially designated household room.
After selecting the installation location and purchasing a product that fully complies with the requirements and is suitable in terms of geometric parameters (diameter), the valve is installed in accordance with its design (on a thread, in a flange, using a coupling). It is important to ensure the tightness of the joints and check this parameter after completion of installation work.
There is no need to confuse air and . We have a separate article about the latter on our portal.
If you are interested in knowing what it is used for, then we also talked about this in another article.
Features of operation
Rules regarding the selection and installation of air valves in the sewer systems of apartments and private houses were included in SNiP only about 10 years ago. The decision on the mandatory installation of such a device is made by a specialist, however, it is believed that the use of an aerator cannot reduce the efficiency and quality of the system. In general, this statement is true, but it is important to monitor the condition of the equipment and its serviceability.
Disturbances may include sticking of the membrane or rod in a certain position.
- If the stop occurs in the “open” position, there is a risk of unpleasant odors from the sewer entering the room.
- If the valve gets stuck in the closed position, the water seals may rupture.
At the same time, the simplicity of the design and the associated high reliability and durability of the equipment, combined with timely inspections of the valves, will make it possible to avoid emergency situations.
Sewage air valve 110 mm installed on riser Installing aerators together with traditional ventilation outlets or vent devices virtually eliminates the possibility of a critical change in pressure in the system and failure of water seals.
Sometimes a situation arises when an air valve that has worked effectively for several years ceases to “cope with its responsibilities,” although there are no breakdowns or malfunctions. Most often this is due to changes in the operation of the sewer system itself, for example, with the installation washing machine, dumping water under pressure. At high speed flow, the pressure in the pipeline changes more sharply, so it is better to install an additional individual valve on the new unit.
The sewer system in an apartment and a private house is designed according to the same principle. from various plumbing fixtures they go into the riser by gravity, and from there they enter the septic tank or collector. An air valve for the sewer system is necessary to ensure that no unpleasant odors appear in the rooms where the sink and bathtub, toilet and other appliances are installed.
Each device must be equipped with a hydraulic shutter. Usually this is a curved product made of plastic, where a certain amount of water is constantly located. It prevents unpleasant air from the sewer system from entering the room.
What causes odors?
When there are no clogs in the sewer system, but occasionally appear, this may be caused by the simultaneous drainage of used water from various devices. Because of this, a certain vacuum of air occurs in the pipe, which can squeeze out the liquid in the hydraulic seals. This causes the unimpeded flow of air, as well as various unpleasant odors from the septic tank or sewer. It was to get rid of this effect that an air valve for sewerage was created, which takes on the task of equalizing the pressure in the pipes.
Its design is quite simple and consists of the following elements:
Rod - the main part of the device, which serves to open and close the hole located on the side;
Housing with a side opening for air intake;
Rubber gasket responsible for the tightness of the control element;
The air valve for sewerage is usually produced in two sizes: for a general riser - 110 mm, and also for individual plumbing fixtures - 50 mm.
How does he work?
The non-return air valve for sewerage operates quite simply. If water is drained simultaneously from several plumbing fixtures, especially in large multi-storey buildings, some air vacuum is created in the riser. Under the influence of a large water flow, pressure increases, and then it drops at the same rapid pace. If there is no ventilation of the common pipe, then the side hole is opened by the air valve membrane, which allows air to enter the riser. After the pressure normalizes, the device closes. This is how the air valve for the sewer system controls the pressure of the riser and, if necessary, regulates it. In addition, it protects the water seals of devices from emptying, so unpleasant odors do not enter the room.
Air valve for sewerage: where to put it?
The device can be placed in the utility room of the house or in the attic. There are two options for one product for a common sewer riser or a separate vacuum device for each plumbing fixture. Installation is carried out in the upper zone of the riser; it should be no lower than 100-150 millimeters from the highest point of connection of the devices. In an emergency, it will not be flooded with sewage. You can connect the product directly into the pipe, or you can use a tee or elbow.
An air valve for sewerage, the price of which starts from 1,500 rubles, is an indispensable device for organizing comfortable living conditions.
Electricity, gas, water supply and sewerage - minimum required communications in modern house. Accustomed to the numerous benefits of civilization, the current inhabitants of the metropolis strive to improve the existing amenities. Therefore, the unpleasant smell from sewer pipes and sometimes frightening “squelching” sounds from the same do not cause enthusiasm among homeowners. Installing an air valve on the sewer will help get rid of them. This is exactly what the article will discuss.
What is a sewer air valve
An aerator (and this is what it would be more correct to call an air or vacuum valve for a sewer) is a device designed to solve one of the most unpleasant problems in an apartment or private house: a difficult odor that no air freshener can cope with. This is not surprising, because the reason lies in improper installation of the sewer pipe system. Because of this, gases accumulate in it and pressure drops occur. Installing an aerator can also eliminate strange sounds that pipes make.
- Why is this happening? In multi-storey buildings still standard solution It is considered that the riser is connected to the roof of the building. This is a simple and proven method of ventilation. However, quite often the system turns out to be unable to cope with its task and unpleasant odors, instead of leaving outside, return to the living room. But it is much worse if fetid streams begin to pour out of the siphons. Here alone moral damage it won't work out.
- The purpose of the air valve mounted in internal sewerage- create a barrier and do not let gases and odors back into the apartment. It automatically blocks the system when the pressure in it increases. When it subsides, the barrier is also automatically removed. That is, the device reacts to violent processes inside the pipes. As a result - dirty wastewater and any unwanted aroma is completely absent from the apartment.
The operating principle of the air valve can be described as follows:
- when water is drained from the apartment, it goes into common system. At the same time, the pressure in it becomes less than atmospheric;
- such a difference does not go unnoticed by the device, and the air valve opens slightly. At the same time, air enters through the side opening;
- When a sufficient amount of air enters the system, the pressure in it will be equal to atmospheric pressure. Then the valve stem returns to its place.
The design of aerators is the same in all cases, despite differences in the mechanism of operation or fastening:
- frame. It is made from rigid polymers, special requirements are presented to its tightness. The top cover is removable, with a reliable threaded connection. This is needed for external visual inspection device and its cleaning. For a tight fit there must be a rubber gasket;
- air inlet;
- opening mechanism- closing the valve. This may be a rod or a single-acting membrane. The second is considered more reliable, since it cannot be jammed by debris that inevitably gets into the system.
Types of air valves for sewerage
According to the operating principle, the valves in the device can be of three types:
- auto. These are installed mainly in small private buildings. It simply cannot cope with heavy loads. Its design will not withstand strong water pressure and a significant volume of air;
- kinetic. Sometimes it can be found under the name “anti-vacuum”. It can only work at low pressures. Such a valve prevents the accumulation of air in large volumes when draining occurs and the system is filled with water;
- combined. It is a device that combines the capabilities of both types described above.
Since the pipeline can be mounted vertically or horizontally, each of them will require different kinds aerators. When choosing them for installation, such a nuance as the diameter of the pipes should be taken into account. The following types of valves are commercially available:
- receiving aerator. Its diameter is 20 cm, and the device itself is equipped with a filter that captures solid particles from the water and does not allow them to pass further into the system. This type of valve is mounted in front of the pump of a horizontal pipeline;
- ball model. Installed on horizontally running pipes of small diameter. These are mainly drainage systems from plumbing fixtures. The aerator got its name because it uses a ball element as a shutter, and a spring provides clamping force;
- wafer model more compact and lighter. It can be installed in both horizontal and vertical pipelines. It can be through (when the flow of water passing through it does not change its direction) and angular (the flow passed through the valve working environment changes stroke by 90°). Disc spring modifications come in diameters from one and a half to 20 cm. Their operation is similar to ball aerators, but the shutter is a plate. Bivalve variations are produced with a diameter of 5 - 70 cm;
- check air valve for sewerage (petal or rotary). The spool acts as a locking element. It then slams shut if necessary, when the pressure in the system drops. Large-diameter valves in such a device have one drawback: they quickly break due to the fact that the spool hits the seat very hard. And as a result, when such a damaged valve is activated during further operation, a water hammer occurs. The solution for valves of large diameters is the use of a shock absorber. Reverse aerators are divided into simple (with a diameter of less than 400 mm) and non-impact ones, equipped with a damper. The first ones are installed in systems that are not afraid of possible water hammer.
There is also a classification according to the method of fastening:
- welding method. It is used in the presence of particularly aggressive environments, in apartments and private residential buildings not used;
- coupling fastening designed for small diameter pipes. Check valve in this case it is secured using a threaded coupling;
- Already mentioned wafer connection type, When fastener absent on the valve itself. In this case, it is clamped between flanges in the pipeline. Due to its compactness, it is advisable to use such an aerator in small areas of the sewer system;
- mounting via flanges using a seal.
DIY air valve for sewerage
You can install the air valve yourself, but if there is even the slightest doubt, it is better to rely on the experience of professionals and invite a specialist. general requirements The following rules can be listed for installation.
- Aerators must not be installed in rooms that do not have constant heating. Air temperature below zero degrees is a good reason to refuse installation.
- The device must not be placed in such a place that it would be inconvenient or impossible to access later. During its operation, preventive inspections will have to be carried out more than once.
- If the installation is carried out in a room equipped with a floor grill, the air valve must be installed at a height of more than 35 cm from the base level.
- To install an automatic aerator, the system will need to determine the point of highest flow into the common riser. The valve is installed at a height exceeding 10 cm from this point.
- The valve of the device must be located directly in the socket of the straight section using an O-ring. The vertical arrangement in the system will ensure its efficient operation.
- The minimum distances specified in the rules make it possible to prevent a situation where waste and fecal matter washed into the system clog the aerator.
Possible installation locations for the air valve
- Aerators with modern design can be installed in both the toilet and the bathroom. They can be easily installed in a vertical riser of a sewerage system (with an exit in the attic).
- Simple devices are placed on the sink, washbasin or bathtub. If we're talking about about the fan pipe, it is better to purchase a cylindrical aerator with a lid for it.
- Air valves for sewerage 50 mm rarefy the air in horizontal parts of the sewerage system (bathtubs, kitchen sinks and sinks). They will definitely have to be installed if the length of the pipes is large enough or there is a transition from one pipe diameter to another. Maintaining an inclination when installing the drainage system will facilitate the natural elimination of dirty water and prevent the accumulation of liquid, and therefore an unpleasant odor.
- Air valves for sewerage 110 mm are primarily intended for fan pipes. As an option, it is possible to install the device on an auxiliary riser, if we are talking about a house where two families live. But at the same time prerequisite All that remains is to bring at least one of them to the roof of the building.
- Regardless of the installation location, the aerator must not be installed into the system at an angle or in a horizontal position.
How to choose the right air valve
In addition to focusing on the horizontal and vertical arrangement of the sewage system, nominal pressure, installation dimensions and method of fastening, when choosing an aerator, a number of other nuances must be taken into account.
- Material. All elements of the device must be made of durable materials that can withstand the aggressive environment of the sewer system and other destructive factors.
- It is important that in the event of a mechanism failure, it is possible to adjust its operation manually.
- Only a reliable valve, which is the basis of the entire structure, can provide adequate protection against unpleasant odors and backflow of contaminated water.
- Since aerators can serve as an excellent passage for rodents from sewers into living spaces, properly designed models provide protection for this case.
Aerator installation
- Before starting work, you must make sure that the flow of water throughout the riser is shut off. The required part of the pipe is dismantled, and an aerator is installed in its place. The instructions included with it describe the entire process in sufficient detail. If the pipe is located horizontally, then during installation it is important to check the direction of water flow with the indicator on the device. The inlet pipe and socket must not be swapped, otherwise the valve simply will not operate.
Scheme for installing an air valve on a sewer
- Aerators for waste pipes allow their installation without compromising the integrity and length of the system. Most often this is a design with a lid in the shape of a cylinder with a diameter of 110 mm. When the lid is exposed to water pressure, it will open. Reducing the pressure will cause closing (this will be ensured by a spring). And no matter how strong the pressure those going in the opposite direction have drain water, they will not enter the room.
Prices and manufacturers
Aerators are positioned by sellers not only as effective and necessary devices(this is easy to verify after reading the above), but also as available mechanisms. But their cost varies greatly depending on the manufacturer and some design features. For comparison, some prices are combined in the table below.
| Diameter | Price, rub.) | Brand / country of origin | Notes |
| 110 | 150 | Politek /Russia | |
| 110 | 1300 - 1240 | McAlpine / UK | The price range is indicated depending on the throughput of the aerator (from 29.2 l/sec. to 19.4 l/sec.) |
| 110 | 365 | SINICON / Russia | |
| 75/100 | 2350 | Maxi - Vent / European association Wavin Ecoplastic | |
| 32/50 | 1580 | Mini - Vent / European association Wavin Ecoplastic | |
| 50 | 2380 - 620 | McAlpine / UK | The price range is indicated according to the valve capacity (from 8.9 l/sec. to 3 l/sec.) |
| 50 | 90 | SINICON / Russia | |
| 40 | 520 - 400 | McAlpine / UK | The price varies depending on the throughput of the device (from 3 l/sec. to 1 l/sec.) |
As you can easily see, Russian analogues are cheaper, but the last word will always remain with the consumer.
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The ventilation pipe of the sewer system is necessary to draw air into the area of vacuum created when the liquid is drained. It removes unpleasant odors from the house. An air valve for sewerage, which has many operational advantages, can replace the vent riser. It is installed indoors, which eliminates icing, and the working mechanism only for air suction will prevent unpleasant odors from escaping from the system.
Device, design and operation of the valve
Working mechanisms and appearance Different aerators have slight differences, but their general design is the same.
The valve consists of:
- The body and the top removable cap are made of PVC material. The cover is firmly connected to the body and is necessary for servicing the working mechanism.
- There is a hole on the side. Air is sucked through it into the sewer system.
- The operating mechanism can be made of a rod with a valve or a membrane. Regardless of design, it operates in one direction.
The main purpose of the aerator is to compensate for the pressure inside the pipeline and prevent unpleasant odors from escaping from the sewer into the room. When using household appliances that drain a lot of water during operation, the load on the sewer system increases. Siphon and fan boner it is no longer enough, this is where the air valve comes to the rescue.
While in sewer pipe The water does not drain, the mechanism is in its original state of rest. The pressed membrane or valve tightly closes the aerator, preventing unpleasant odors from escaping from the system into the room. The movement of liquid through pipes during draining changes internal pressure, creating a vacuum. This triggers the mechanism.
The valve opens slightly and suction occurs clean air through a side opening from the room into the system. The air pressure inside the system equals atmospheric pressure closes the valve, returning the mechanism to rest mode.
As you can see, the aerator works on the principle of a siphon, only the latter is not able to withstand strong air shocks, which leads to the breakdown of the water lock. Often this picture is observed when flushing a full toilet tank. A high pressure drop breaks the siphon water seal, standing nearby washbasin
If we talk about the operation of the air valve, then the difference atmospheric pressure prevents dirty air from the system from penetrating into the room through open valve during its operation. According to the laws of physics, the movement of air masses from a low pressure zone to a high pressure zone is impossible.
Existing types
The operating principle of all aerators is the same, but they internal organization, sizes and appearance may vary.
Size difference
Air valves produce different sizes. The most popular devices for home sewage systems are those with a diameter of 110 mm and 50 mm.
The size of the aerator affects the location of its installation:
- A product with a diameter of 110 mm is installed on a sewer riser leading inward from the building attic space. Alternatively, a 110 mm valve can be mounted on an additional riser inside the bathroom, provided that a second aerator with a diameter of 110 mm will be installed in the attic.
- A valve with a diameter of 50 mm is capable of servicing one or two plumbing fixtures and is installed on a sewer pipe directly next to them. Installation of a 50 mm aerator is required when changing a pipe from one diameter to another or when long length horizontal pipeline. In the latter case, the correct slope must be maintained, otherwise the operation of the aerator will be impossible.
The choice of installation location also determines the type of product, or, more precisely, the functionality of its mechanism.
Difference by type
In addition to sizes, aerators come in different modifications. This must be taken into account not only when choosing a product, but also during installation.
Features of the valve mechanism operation divide the product into the following types:
Aerators can work with horizontal and vertical pipelines, which must be taken into account when choosing the appropriate model.
Difference in mechanism design
Depending on the working mechanism, air intake products are divided into several types:
- The receiving type of mechanism operates on a horizontal pipeline. If there is pumping equipment, then a vacuum aerator is placed in front of the pump. Thanks to the built-in filter, solid fractions that cause harm to pipes are retained.
- The wafer design is classified as a primitive type. The valve is mounted between the two ends of a cut pipe with a diameter of 110 mm. Due to the flanges, the tightness of the connection is achieved.
- A valve designed for installation in horizontal pipelines with a diameter of 50 mm is equipped with a ball mechanism. The name of the mechanism comes from the ball valve located inside the case.
Aerators equipped with a rotary or petal mechanism are not installed on sewer risers with a large pipe diameter. This is due to weak spool valves, which often break.
IMPORTANT! Regardless of the design and installation location, air valves must not be installed on an incline or horizontally.
Installation features that need to be taken into account when installing the product
When choosing a place to install the aerator, you need to take into account the year-round indoor air temperature. It should always be positive. The end of the riser with the valve must rise 150 mm above the highest entry point of the pipe extending from any plumbing fixture. If there is a grating on the floor indoors, the product rises 350 mm above it.
When choosing an installation location, it is necessary to provide free access. Over time, the mechanism will require revision or repair. It is important to pay attention to the air capacity markings indicated on the housing and take care of a tight connection between the product and the pipe.
Self-installation of the valve
If you have to install an air valve for the sewer system in an apartment, you must turn off the water supply and warn your neighbors to avoid flooding the room with sewage. In a private home, such problems, as a rule, do not arise.
The installation process is simple and does not require special skills. On a riser, the aerator is simply installed vertically into the pipe hole. For tightness, rubber sealing rings are used. To make it easier for the product to move along the seals, they are lubricated with silicone.
On horizontal pipelines, the valve is placed at the very high point. Here you may need a tee for insertion. Its side outlets are connected to the two edges of the cut pipe, and an aerator is vertically attached to the middle outlet. When mounting the product at the entrance of a horizontal pipeline near plumbing equipment, the valve is placed along the arrow on the body, indicating the direction of movement of the liquid.
An aerator is not a must-have piece of equipment, but it brings great benefits. If you are not sure about the need to install the product, it is better to seek advice from specialists.
