The sewer system is an open system, so faecal material can flow backwards when the pipes are clogged. To avoid such a nuisance, you should install a check valve for the sewer.
Types of non-return valves and their installation locations
The valve can be installed in two ways:
1. Installation of one common check valve, the capacity of which is very high.
2. A non-return valve is installed on each element of plumbing.
The general valve should only be installed in rooms whose area is not large. In addition, the installation of valves in a similar way depends on the location and design of the sewer system itself. A common sewer valve is very rarely installed. Installation of the second method is used more often, since in this case the area of \u200b\u200bthe house and the location of the sewer system do not play a special role.
The check valve for sewage has two varieties: conventional and for toilets. Second viewIt is also called a non-return valve for fan pipes. Such valves are mounted directly in the pipe. Especially responsibly, you should approach the installation of check valves for toilets if there are pipe counterslopes, and it is not possible to correct this situation. Valves are mainly made of metal or PVC. In the past, flanged metal valves were used, but their use is becoming less common every year. This is due to their fragility.
Sewer check valves and their advantages
You should know that the check valve for water and the valve for the drain pipes have a different design and a different principle of operation. The first valve has several different levels in the nozzles. In the space between several nozzles there is a ball filled with air. If water begins to flow through the pipes in the opposite direction, then this ball closes the inlet pipe by pressing on a special membrane. Such valves can be easily cleaned, as they have a removable cover. In addition, they can be blocked in the event of a blockage using a special valve.
For fan pipes, valves are installed directly into the pipe itself. In diameter, this valve reaches eleven centimeters. Usually, a sewer check valve goes on sale in the form of a cylinder with a lid that opens under pressure (pressure) of water. After draining the water, the lid returns to its original position using a spring mechanism. The lid only opens in one direction. In other words,if the feces flow in the opposite direction, they will not be able to open the lid.
Even in those homes where the system works properly, it is necessary to install a sewer check valve, as it not only delays the flow of fecal matter, which can change its original direction, but also prevents unpleasant odors from the pipes of the sewer system.
