Owners of apartments on the first floors often face problems when sewage floods their homes. The liquid from the system quickly spreads throughout the premises and causes material damage. In order to eliminate such troubles, you can use check valves on the sewer. These devices prevent the return of drains to the apartment. However, before purchasing such a product, it is important to familiarize yourself in detail with the features of the installation work.
Feedback on the need to use the valve
According to users, for the normal functioning of the system, it is necessary that wastewater flow through the pipeline at a certain rate. The movement is provided by a slope, which must be laid down when arranging the system. If it decreased as a result of subsidence of the foundation or was initially insufficient, then the speed of movement of effluentsmay slow down during operation. Here lies the main cause of clogging of the sewer, which is expressed in the wrong slope of the outlet pipes. In this case, large solid particles will settle on the walls, since the force of water movement will not be able to act on them with the intensity that would be sufficient to move the mass. At some point in time, deposits will close the pipe gap.
Use when the system is installed incorrectly
As pointed out by users, the same thing happens when the slope is too steep for the water to keep up with the waste. Sewer check valves may be needed when the pipeline is worn out. This occurs during long-term operation of the system, inside which deposits are formed. The clearance inside will be less and less, and under the condition of a normal flow rate, coarse-grained elements will be fixed on the walls. Gradually, they accumulate, gain hardness and form a blockage. Home craftsmen note that the need to install the described element may be required when the horizontal branches are installed at a right angle. These nodes change the configuration of the pipeline, as a result of which the speed of movement of effluents is lost. Whether it slows down or speeds up, it negatively affects the performance of the system, causing clogging.
Installation recommendations
Return valves for sewerage are installed according to a certain technology. Before starting installation work, it is necessary to determine where the node will be located, while it is important to take into account the provision of free access to it for maintenance and cleaning. When choosing a device model, it is necessary to be guided not by low cost, but by quality characteristics, since the cost of a valve cannot be compared with the cost of repairing an apartment when it is flooded with drains. The master should pay attention to the equipment installation technology.
Most often these devices are universal, but on sale you can find models that are designed only for vertical or horizontal installation. Check valves for sewerage are checked for leaks before installation. For installation, it is necessary to make a cut of the required size in the pipeline, and then lead the pipes into the valve. If the sewerage system is made on the basis of cast iron, then an adapter from metal to plastic will have to be installed. The element is mounted in accordance with the direction of fluid movement. Each unit has an arrow that indicates this direction. It should be directed towards the collector.
Work methodology
The check valve for sewage, the photo of which you can see in the article, can be installed on separate equipment or on the entire sewer. In the first case, we are talking about a sink or toilet. If you have a liftingvalve, then its installation is carried out exclusively on a horizontal section of the sewerage system. Before starting work, it is necessary to select the equipment. The choice should be based on the characteristics of the system, such as the volume of wastewater. Among other things, it is necessary to select a device, taking into account the installation location of the device, it can be the entire system or a separate node.
Before you install a check valve on the sewer, you need to choose a place in front of the common sewer riser. If work is being carried out on an existing system, then in a certain place a section is cut out of it, which will correspond to the dimensions of the valve. If the entire sewerage system is being equipped, then the equipment is installed in the right place. The next step is to check the tightness of the device.
Installation of a non-return ventilation valve on the sewer
The PVC sewer check valve can be designed to deal with extraneous noise and unpleasant odors. Such a device is called an aeration valve and is installed according to the fitting principle. Initially, the master must choose a place for installation, which will depend on whether aeration is required for the entire sewer system or a separate unit. In the latter case, the valve is installed with a deviation of 30 centimeters from the gravity pipe. From the nearest siphon, the element must be removed by 20 centimeters.
Nuances
In the first caseproducts are mounted in a specially designated room or in the attic. The installation of a check valve on the sewer is carried out according to the principle of fixing to the pipe using a fitting or thread. At the final stage, you need to analyze how tight the joints of the device with pipes are.
For reference
In order to ensure the correct operation of the device, it is important to guarantee the air temperature, which should not be less than 0 degrees.
Return valve device
The plastic check valve for sewerage has certain design features. On sale you can find devices of this type, which consist of a housing made in the form of a pipe segment. Inside there is a locking plate, which is equipped with a rubber seal. A spring made of stainless steel is fixed to it. The valve body has a removable cover that allows cleaning from the inside, which may be necessary in case of contamination. On the body there is a lever with which you can open or close the valve manually. If it is in the closed position, then the shut-off plate is stationary and at the same time it does not let drains through. If it is open, then impurities pass through it. Drains leave the apartment, rushing to the sewer riser and lifting the shut-off plate. As soon as the drain has been completed, the plate returns to its place under the influence of a spring. If there is a reverse current of sewage, then this element will not let them into the dwelling.
What else you need to know about constructivefeatures?
The poppet has a diameter that is larger than the corresponding stop value, this ensures the reliability of the valve neck. If you are interested in a sewer check valve device, then you can consider another version of it, which has a smaller diameter. For such a device, the level of location of the outlet and inlet pipes will be different. Between these two elements there is air, which presses on the membrane of the outlet pipe, this happens when the water flows back. The membrane is necessary to close the pipe, which prevents the flow of water in the opposite direction.
Is it possible to make a valve with your own hands?
It is quite possible to install a non-return valve for sewage with your own hands, but even a specialist cannot make such a mechanism. Such nodes are performed in a factory using special technology and equipment. For example, the simplest model includes a diaphragm valve, a lever and a removable cover. The last element is necessary for cleaning the device when clogged. If you still decide to start manufacturing, then in the process of work you can use brass, bronze, stainless steel, cast iron, as well as plastic.
A wafer valve can be made on the basis of a diaphragm, which is represented by a disc. Instead of a lever, you can use a spring. If you decide to make a two-leaf valve, then the membrane should be made from two leaves. In the presence of a sewer pipe of small diameter, a ball valve can be made, which has a membrane inthe form of a ball, as well as a lever-spring. This type of device is considered the most reliable and common. In order to replace or service the device, the valve will need to be disassembled, while the master will not face any particular difficulties, since its installation is done with two bolts.
Check valve reviews
Check valve for sewerage, reviews of which you can read below, can be intended for external and internal sewerage systems. According to users, it is not recommended to manufacture this unit, since improper operation of the device can adversely affect the functioning of the entire sewerage system. Customers claim that high-quality valves have mechanical strength, reliable connection to the main line, and resistance to aggressive media.
Mechanical strength is extremely important because the entire section of the route and the surface of the valve will be affected by external ground pressure. This is true for nodes intended for an external sewage system. But valves for external and internal systems should have resistance to aggressive environments.
Customers say that it is important to install an aeration valve, which will prevent the passage of unpleasant odors through the internal wiring. If you do not want to hear extraneous sounds that occur in plumbing fixtures, then you need to install a check valve.
