Sewer valve: purpose, principle of operation, types

24-07-2018

Sewage

The main task of the sewage system is to drain wastewater from a house or apartment. But what if for some reason the pipes are clogged? Where will the sewage go?

Also, do not forget about the smells that can penetrate into the room and with good sewage. You can protect your home from such troubles with the help of special valves, which will be discussed in this article.

Types of valves according to their field of application

The common tasks of any valve are to ensure and control the one-way movement of the fluid passing through it. But their technical interpretation, installation features and areas of application for different plumbing assemblies may differ.

Siphon

Classic water valve for the sewer in the form of a knee

The main task of the valve out of water is an obstacle to the penetration of odor. He will not stop more serious flows in the event of an accident, but he copes with daily protection from unpleasant odors. There are two design solutions:

Siphon type	Special features
Knee or tube	low price; simple construction; easy installation; problems in case of clogging - punching is possible only with the help of a sewer cord
Bottle	somewhat more complicated device; the ability to easily do the cleaning work with your own hands, it is enough to unscrew the special cover and remove the clogged debris

Bottle siphon with easy access to its inside

Tip: if you have a washing machine or dishwasher, it is recommended to buy a bottle-shaped water stopper with a fork in two or more outlets. Then you do not need to perform special plumbing work for the withdrawal of an additional socket, which will favorably affect the family budget.

Photo of installed siphon with additional taps

The principle of work is that, thanks to a special design, all the water does not go down the drain when using a sink or toilet bowl, and part of it remains a kind of stopper at the bend, as shown in the following figure:

Scheme of the water trap under the sink and toilet

Check valve

Sewer check valves and valves are a more radical and effective solution to protect against possible entry of sewage into the room. But what could cause such an unpleasant effect?

And the reasons may be the following:

Broken instruction manual, namely, attempts to flush insoluble large-sized substances into the sewage system. The cork formed from leftover food, pieces of vegetables and other possible debris tightly blocks the movement of water in the pipes and stopping the entire system. Particularly disastrous consequences will occur for the lower floors of high-rise buildings as a result of the pressure of the water column.
Long period of use of pipes, which leads to a significant decrease in their internal diameter.

The result of long-term operation of the sewer system

Tip: do not wait for the complete clogging of pipes, it is better to make their planned replacement. So you reduce the possibility of an accident.

Incorrect pipe angle. If it is too small, the pressure of the water will be too weak to have time to flush the solid particles before their dangerous accumulation, and if it is too cool, the flowing fluid will not have time to take the garbage with you.

So, we rated the level of danger, how does a check valve handle it? The general meaning of his work is the presence of one or more valves that can only be opened in one direction. That is, the fluid flowing out of the bathroom pushes the partition forward and flows further, but if suddenly under pressure it goes in the opposite direction, it will not be able to overcome the obstacle that has arisen.

The principle of operation of the two-chamber mechanical shutter

As we have described, the usual mechanical valve works, but there are also electrically driven devices. In principle, they perform a similar function, only they are capable of automatically closing the valve in cases where the solid masses interfere with this by their cluster. (See also the article Air valve for sewage: features.)

The device of electrified valves has the following elements:

Component name	Purpose
Two chambers with valves: mechanical and electrical	Control and carry out the transmission of sewage in the direction of sewage
The electronic unit	Provides indication and control, also includes an alarm in case of emergency
Fill level sensor	Built in the body of the structure and gives a signal to open the valve, equipped with an electric drive
Power cable	Provides electricity to the appliance.

The electric automated device on an obstacle of penetration of sewage from the sewerage to premises

Such a device is installed on a common for an apartment or a private sewer and is connected to the power supply panel.

Dry shutter

Dry-drain sewer is widely used in shower rooms and has several types:

Title	Principle of operation
Membrane	The flow of water removes the membrane in the spring and flows further, after which it smoothly returns to the site, closing access to unpleasant odors
Float	It has a special float, always located on the surface of the device and going down, closing the hole, only after the liquid has left
Pendulum	Thanks to gravitational forces all the time trying to take a position in which the sewage will be locked
Remembering	Elastic tubes are used, which “remembering” their shape, are constantly trying to restore it, thereby preventing the penetration of odors

Conclusion

Qualitatively and properly working sewage does not exclude the possibility of its failure as a result of blocking the system at any time, which will lead to tragic consequences in the form of sewage penetration into your home.

This can be prevented by installing sewers, which prevent not only the reverse flow of liquids, but also the penetration of smelly odors. With their views you have read above.

The installed sewer valve guarantees the absence of unpleasant odors and the consequences of possible accidents.

The video in this article will provide you with additional information. Home improvement is responsible!