Is it necessary to install a valve switch to prevent the backflow of wastewater after the main pipe

You install valves in the main pipes, the sewer pipes are blocked, the valves are closed, and the waste water can't flow backwards, but the water from the upper floors is poured into your house. This method is not advisable. At present, some buildings are equipped with double sewers on the first floor, that is, the upstairs sewer pipe goes straight to the outdoors through the first floor, and the first floor has its own sewer pipe.

This prevents the sewer pipe from clogging and backwater from reaching the first floor.

It is possible to install a valve on the horizontal sewage pipe between the toilet bowl and the main building pipe, but the key is to find the right valve and the person who can install it? Open the valve when the normal sewage is discharged, and close it when there is a backsurge, which can ensure your own home, but the backsurge will move to the upstairs, which only solves your own problems, but if the upstairs waterproof is not good, it seeps into the ceiling of your home, which is also a very distressing thing.

It is necessary to decorate the valves, because there are so many sewer pipes in a room or a house. Therefore, you still have to decorate the valve, so that you can have a better maintenance or have a top mouth function to better play the requirements of good design and maintenance.

How many floors? There is no way to install it on the first floor, and there is no need to install it on the upper floor, so it is useless.

Needless.

First of all, if you can install it, where do you plan to install it?