The check valve for the water drain: the protection of the home from the wastewater

Due to the blockage of sewerage system may be a situation when the pipes in the reverse order begins to move all its contents, pouring from plumbing fixtures. This problem often arises in the apartments on the first floors of apartment buildings. In a private home it is possible in case of an overflow well. To avoid such troubles should install a check valve to drain. About how to choose the device that can be found in this article.

Why the need for a check valve: device designation

Before considering the question of the appointment of the valve, it is necessary to understand how the sewage system. A system consisting of pipelines, operates on the principle of communicating vessels. When a section of the blockage occurs, drains are in the pipes, will seek a way out. Faeces via pipelines will rise and flow out of plumbing fixtures, creating an unpleasant environment for the residents of an apartment or house.

To avoid such a situation is set sewage check valve. Its main purpose is to block the return movement of wastewater through the pipeline in the event of blockage of the system. This occurs in horizontal pipes, which are located in a basement. Wastewater begin to move up in the search terms available for expiration. The valve closes the lumen in the tubes.

The devices are installed primarily in lines to the plumbing items in the first and second floors of each block of flats. This dual action is absolutely necessary, because drains, finding no outlet on the ground floor, will be raised to the second. Above this level of waste water do not reach. Stoke will already be able to push the plug and move freely sewer pipe.

However, in the case of a strong network of foreign objects clogging sometimes there are situations when the fecal waters can flow from plumbing fixtures located on the higher floors, depending on the place of education traffic jams.

In a private house, which is connected to a centralized network, a check valve is mounted on the inner side of the manhole before release. This device should be installed and for autonomous drainage systems where runoff is collected in a drain pit.

Useful advice!The check valve in a private house acts as a barrier to rodents and other animals, which can penetrate into the room through a sewer pipe.

Design and operation of the check valve for sewerage

The check valve has a hexagonal housing, wherein the inner cavity is divided into several sections: reception area, limiting the system fixing the locking element with the function of the Audit window and an outlet part.

The receiving compartment is located in front of the locking element. It connects the inlet to the waste pipe. The limiter allows free movement of fecal waste solely in one direction. In the case of reverse movement of the valve element closes.

The discharge zone promotes the smooth flow of movement of the limiter cover. It is the connecting link between the unit and outlet manifold.

Important!All working valve area may have a different design concept, depending on the device type, but the operating principle for all models are the same.

How does the check valve for sewage? The operating principle of the device is based on stopping the reverse flow of waste mass by overlapping tube section by means of the closure member. This occurs at the time of stopping the free movement of the soil pipe fluid. At this time, the pressure is equalized in the inlet and outlet. Section bars the locking element closing the valve under the action of gravity.

a check valve can be operated automatically or mechanically. Nominal diameter pipe connections manufactured devices is 50-300 mm. The valve, depending on the design, can be mounted vertically or horizontally in place of the pipe joint. Thus it can be mounted on a common sewer or retraction of each santehpriborov. In the first case the device is chosen with a diameter of 110 mm, and in the second - 50 mm.

Important!The check valve on the tube 32 and 40 mm, should have a diameter of 50 mm, special adapter is used for the connection.

Check valve for sewerage: embodiment of the device

Non-return valves for sewer classified by type and principle of operation of the locking element. There flap, ball, flanged and lifting devices.

Swivel (flap) equipped with spring-loaded check valves circular membrane, which is attached to the upper inside portion of the housing. At the moment of the free movement of mass of the sewer it is raised upward. When a reverse current of liquid, the plate is rotated and pressed against the rim of the inner surface of the outlet fitting sealingly and tightly closing the tube section. Some devices may be equipped with a manual gate that is a second membrane, which is carried out by means of control buttons.

The check valve has more dimensions in comparison with the sewer pipe. When installing it formed narrowed and extended zones, which are the ideal place for the formation of blockages. Will eliminate such troubles removable cover which is disposed at the top of the enclosure. In this regard, for sewage check valve (40 mm) of the rotary type are not recommended.

The ball check valve is equipped with a locking device in the form of a ball. Therefore, these models have a specific internal structure. In the upper part of the housing is an indentation, where the ball at the moment of the smooth flow of fecal fluid through the pipeline. When the movement ceases sewage mass, it is rolled out and closes the lumen in the tube, preventing the return of the effluent.

Important!Such a valve does not exclude the possibility of leakage of effluent in the opposite direction, that occurs due to gapping bead to the sidewall of the housing.

Both variants diameter of 50 mm are most common in the system. Devices capable of withstanding high pressure, which is characteristic for the system of a multi-storey building.

Types of valves: characteristics and wafer lifting devices

Wafer device is characterized by small size, relatively simple device. The check valve consists of a body having a hollow cylindrical shape, the inner side of which the rotary bolt is located. The element may be formed in a small disc shape attached to the wall of the housing by a spring, or consist of two flaps which are fastened to the rod passing through the center of the device.

Housing on two sides with a sealing member through which mounting device is not required to use the extra padding. The disadvantages of such a device is the impossibility of household cleaning. To access the internal components of the device need to completely disassemble the connection. Such devices are available with a diameter of 160 mm. They are used in large drains or sewer systems of industrial enterprises.

Useful advice!Wafer valve can be selected even in the case of a constrained space for its installation.

In reverse lift valve closing element is raised upwards when the waste fluid is free to move in the system. This is ensured by the pressure exerted on the plate, which is pressed against the top of the housing. At the time of stop-motion spring expands, plate overlaps the clearance, which is achieved due to the nonlinear shape of the hull.

Lift check valve is the most reliable kind devices, however often has the tendency to clog. To clean the inside of the cavity, remove the cover by unscrewing four bolts. This type of device is most commonly used as a check valve to the toilet on the first floor.

Automated check valves for the water drain

Many manufacturers of new technologies used today to improve the work of the sewer system. Among the most popular achievements are the automatic operation of the check valve drain. The apparatus is mounted on the conduit and connected to the network voltage of 220 V.

In the event of a power outage automatic check valve can operate smoothly in performing their functions, thanks to the built-in battery. Periodically check the charge level of the device. Manufacturers produce automated, both horizontal and vertical non-return valves for sewer.

The principle of operation of the automated check valve is as follows. At the moment of expiry of free sewage through conduit devices damper is fully open. This prevents the formation of mud skirting which may subsequently cause a partial closure of the valve in case of reverse current sewage.

At the time of reverse wastewater through a check valve integrated in the probe, on reaching 70% of the filling pipe is triggered alarm. At this time, switched the light and sound to warn of blockages sewer system. Simultaneously, the valve flap is sealed, providing high reliability.

How to choose a non-return valve for sewerage 50 mm and more

When choosing the type of device to be guided by the features of the sewer system. Depending on the selected resolution of the check valve for sewerage, manufacturing material and diameter of the socket.

Choosing a specific model, it is necessary to ensure the reliability of devices that must be made of durable, resistant to the adverse effects of aggressive environment material. The check valve is required to be easily installed and simple to maintain. The best in this respect are the model with a removable cover, which is necessary for cleaning the hull elements.

The reliability of the automatic mechanism for closing the pipeline section at the time of return fluid flow is the guarantee of durability of the device. Should be favored models with the possibility of manual adjustment in the event of an accident.

The diameter of the funnel is chosen based on the pipe size. Do not choose a larger or smaller size of the device cross-section, as it will take the use of adapters. This will break the harmonious mechanism of functioning of the entire system, reducing the capacity of the pipeline. However, the check valve 32 mm for sewage selected diameter of 50 mm, matched to it the necessary adapters.

Material for the manufacture and arrangement of the check valve

Material for the manufacture of the check valve must be the same, and is made from a pipeline itself. Depending on this, the article may be formed from plastic, steel, cast iron or bronze. The most affordable are plastic devices. Price check valve for sewerage PP 110 mm is 420 rubles, and iron -. 700 rubles.

Important! If the check valve and the sewer pipe are made of different materials, for installation devices used special adapters.

valve dimensions are determined by the place of its installation. It should be borne in mind that there are models for horizontal and vertical mounting. For toilets and sinks bathtubs advantageously applied first embodiment. This may be used for drainage check valve 50, 60, 100, 110 and 160 mm, which is determined by the diameter of the drainage pipe. The second type of devices used during abduction effluents from sinks and washing machines. For this set vertical check valve for sewerage 50mm.

Quality product has on the upper part of the housing arrow which indicates the direction of motion of sewage, to prevent an error when assembling the device.

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Water seal for sewer: an important element of the sanitary equipment

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What is the air valve for sewerage

The air valve is mounted in a sewer pipe. It is used for air vpuskaniya the sewer network and the exclusion output it back, which is an obstacle to the emergence of unpleasant odor in the apartment. It also reduces the noise level at the time of run-off water in the system.

device operating principle is as follows. During the descent of water in the sewerage network is in vacuum. Outside air in it should do. If the system is equipped with ventilation, no problem. In case of lack of air will flow from the sanitary appliance with the smallest water seal.

When a vacuum valve membrane is opened, and when the network pressure is stabilized, - closed. Thus, air is supplied only to the sewer, and back into the room misses. For the manufacture of air aerator is used as the check valve, the high-quality plastic.

The air valve must be installed in all the buildings, which height is more than two floors. It is mounted at a location where the temperature is below 0 ° C. If the room is set trap in the floor to drain the water, then the device is fixed at a height of not less than 35 cm above the floor. When the ladder is absent, the valve is located above the highest pipe in the sewer pipe that is connected to the sanitary apparatus.

The air valve is made of polyethylene. It consists of a housing, a rod or a membrane that responds to the occurrence of excess pressure in the network, a rubber gaskets, which limits the movement of the stem, causing it to work properly, the cover that protects against contamination. For connection to the sewer is located on the chassis side opening.

There are three varieties of the vacuum valve. For a single sanitary appliance can be installed an automatic air valve with a small bandwidth. Greater bandwidth is characterized antivakuumnaya or kinetic model that can operate at low pressure. There is a combined type of valve that combines both variants of the device.

The air valve is mounted in a flared connection. For one discharge point device is used with a diameter of 50 mm, and vacuum valve mounted to sewer 110 mm for the total of the riser.

Rules check valve installation for sewer

Check valves equipped with spring locking element can be mounted in any position on the pipeline. Devices that do not have springs should be arranged exclusively vertically.

Important!Before all types of check valves, in addition to the ball mechanism, install a strainer to protect the device from contamination large debris in the drain.

installation location is selected on the basis of easy access to the device, which should not take loads of torsion, bending, compression or stretching of the connected pipes. Valve position is chosen based on it from said flow direction, since the apparatus operates on flow pass in only one direction.

There are two options for protecting facilities against flooding by sewage. The first involves the installation of a check valve for sewerage 110 mm in the main conduit and is used mainly for the flats of a multistory building. In the second embodiment, mounting devices is performed for each discharge source, which is characteristic for the private sector.

Need for mounting tape, hemp and sealing compound. The first step is carried out off the water supply riser using latches at the input. This is necessary to exclude the probability of producing unauthorized water enters the circuit sewer system.

After selecting a location on the conduit pipe portion is cut, the size of which must correspond to the length of the valve. PVC-return valve is mounted by means of the dressing on the free edges of the socket pipe and sealing the sealing bands. For greater reliability butt joints are pre-treated with sealant.

Cast iron model is set by means of bolts, tightening the mounting plate, and sealing rubbers. If you choose a model with bells, it is mounted traditionally with hemp and by pouring silicone seam. After completion of the water supply is resumed. Check valve for pressure sewer is installed on the same principle.

Important! To ensure reliable, efficient and long-lasting operation of the check valve should be to carry out maintenance on a regular basis.

The sequence of installation of the vacuum valve for sewerage

The valve is mounted in vertical position to drain. It is essential that it is positioned in a location that is above the point of connection of plumbing fixtures. The room should be well ventilated, where free access to the service device. The apartment this device is installed in the bathroom, and in a private home - in the attic. It is located after the check valve to the toilet or other plumbing fixtures.

Important! The diameter and material of manufacture of the valve must match the pipe. Otherwise, use special adapters with rubber seal.

After selecting the installation site, disconnect the water supply. Next cut sewer pipe, burrs cleaning is performed on it. On incision mounted tee. The central opening acts product slot of a vacuum valve. Most devices are characterized models flared one compound.

When using rubber sleeves, lubricated with silicone, the connection is made of all the elements. Reliability is ensured by sealing joints rings. On the new sewer system should provide shaped inserts. After completion of all works water supply is resumed.

Concealed valve assembly involves the use of specific device models. In case of staying in the indent or riser protective boxes performed the vent on the grid dimensions of the aerator. The valve body should be sunk into the wall. The fastening element must be adapted so that an outer surface located flush with the wall. Visible is only the grille, which is fixed with screws.

Important!There are models aerator that can be used as an opening for cleaning a sewer network that occurs after the valve mechanism removing from a pipe with an institution of a cable.

The check valve is an important and necessary element of the sewage network, which prevents flooding of sewage facilities in the event of blockage of the system. Model selection depends on the installation place, the material and diameter of the tubes. Thanks to its simple design, you can easily mount a check valve for sewer with your hands, keeping a certain course of action.