Vacuum valve for sewage: photo, principle of operation. Installation of vacuum valves

When constructing the sewage infrastructure, ventilation ducts for the removal of offensive fumes should be provided. Not in all cases, especially private homeowners, think about such a supplement, but it is necessary to maintain sanitary and hygienic standards. The situation is aggravated by the fact that the operation of the waste tap can occur in the regular mode even without the integration of special ventilation devices. However, an increase in the concentration of rarefied air in the sewage system will sooner or later turn into an accident. To prevent unpleasant consequences, the vacuum valve, whose photo is presented below, will help. This device brings out extra pairs, and with them smells.

When should I use the valve?

To begin with, it is important to note that public service employees do not have the right to impose the installation of sewer valves. Unless in multifamily houses the problem of ventilation is solved by the service company. With the need to install the vacuum valves are usually faced by the owners of private houses. So, if a suburban cottage was not originally provided with a water trap with a riser outlet through the attic outside, then it would be necessary to retrofit the system. In this case, not always even in private homes, a vacuum valve for sewage solves the problem of tapping accumulated gases. For example, if two toilet bowls are used in different rooms, then the device may not work if it is simultaneously drained. There are almost no alternative options for this system, however, properly designed regular ventilation can completely eliminate the need for such an addition.

Component device

In essence, this is a typical shaped part, which is connected to the pipeline by means of a sealant. The basis of the element is a plastic case, in which a side opening is provided. That is, it is necessary to select a vacuum valve for sewerage with specific parameters. As for the inner filling, it is represented by a rod, which at the time of activation opens the same hole with the valve. The action of the rod is regulated by a rubber lining-limiter. Also, some models provide protection in the form of a cover that covers the stem assembly.

Depending on the modification, the device can be supplemented with other functional devices. In particular, a modern vacuum valve can have a rubber membrane replacing the stem. From the point of view of the effectiveness of this decision, it completely justifies itself, but many users complain about the fragility of the rubber parts as such.

Principle of operation

The operation of the device is similar to the operation of most other valve mechanisms - accordingly, it has two functional positions. In the normal state, the valve is closed, which ensures the integrity of the sewage system and does not allow smells to enter the premises. But the main task is not this. The possibility of removing gases to normalize the pressure is the function for which the vacuum valve is installed. The principle of the aerator is based on the interaction of the sensitive gate, which reacts to the concentration of water, and gases inside the sewer. In other words, when using the same toilet, the valve also activates, letting in additional air volumes.

How to install a vacuum valve?

The device itself is quite compact, and at the stage of the initial laying of the sewage system its installation will not cause any special difficulties. Direct installation can be performed in three ways. The most reliable and common involves the use of a threaded joint. To do this, it is necessary to form a thread, treat it with a silicone sealant and make a connection. Alternatively, the installation of vacuum valves via the bell is also recommended. In this case, it is necessary to prepare a rubber cuff, also treated with sealing compounds, after which tightly attach the device to the end of the pipe. The third method involves the introduction into the design of an adapter, the termination of which is optimally suited for connection to both the valve and the sewage system.

Pros and Cons of the Vacuum Valve

Like any additional component in the engineering system of the house, the sewer valve gives not only pluses, but also minuses. Advantages include its main function of stabilizing the pressure inside the pipeline. If, however, to evaluate this element as an alternative to the traditional ventilation devices of the sewage system, the specialists first of all point out the absence of the need for organizing complex pipe outlets through the roof. Now it is worth highlighting the drawbacks that distinguish the vacuum valve integrated in the sewer system. First, the device can withstand only small pressure loads, so it is advisable to use it only in small houses. Secondly, even models equipped with a rod do not differ in durability. Roughly speaking, this is a plumbing consumable, which will eventually have to be replaced.

Conclusion

To find a suitable vacuum valve model on the market today is not difficult. So, qualitative import offers from companies Ostendorf and Sanit are estimated at 1000-1500 rubles. If we are talking about small loads in a simplified sewage system, you can buy a Russian vacuum valve from the producers of "Politec" or "Polytron". This is a budget product available for 200-300 rubles. Provided that proper installation is performed, even an inexpensive valve will effectively perform its function, preventing the passage of an unpleasant odor from the sewage system. Expensive models, in turn, can completely replace the sewage ventilation, as well as cope with the tasks of aeration. However, the overall quality of the drainage system is determined both by the characteristics of the main pipeline, and also by its connection with the domestic plumbing.