Why use two sewer pipes in high rise toilets

The two sewer pipes in the high-rise toilet are sewage pipe and ventilation pipe.

Pipes, the thick ones are the sewage pipes, and the thin ones are the ventilation pipes. The function of the ventilation pipe is to allow the odor of the toilet to be discharged, and the sewage pipe is connected to the toilet bowl and the floor drain to discharge the dirt. The ventilation and sewage pipes work separately and eventually merge into one tube on the ground floor.

The ventilation tube ensures that the pressure of the sewage pipe is equal to the atmospheric pressure. For example, if the substances discharged from high-rise households will be discharged to the bottom through the sewage pipe, if the pressure of the sewage pipe and the atmospheric pressure cannot be guaranteed, the pressure in the sewage pipe will be quite huge, and if it is not good, it may directly break the sewage pipe. The installation of the ventilation tube is to ensure the balance of the internal air pressure.

The two sewer pipes are a sewage pipe and a waste water pipe.

The sewage pipe mainly discharges the water generated by toilets, etc., and finally discharges it to the septic tank; The waste pipe mainly discharges domestic water generated by washing, bathing, etc.

In the toilet sewer system of high-rise buildings, it is common practice to use two sewer pipes, one for the main pipe and the other for the backup pipe. The purpose of this design is to improve safety and reliability.

Restrooms in high-rise buildings use relatively large amounts of water, and sewer pipes are subjected to greater pressure and load. In order to ensure the proper operation of the sewer system and prevent problems such as clogging and leakage, the use of two sewer pipes can provide backup access. If the main pipeline is blocked or other faults are performed, the backup pipeline can replace the function of the main pipeline to ensure the normal discharge of the sewer system.

In addition, the use of two sewer pipes increases safety. In the event of a ruptured or leaking sewer pipe, the backup pipe can play a temporary remedial role, reduce the impact on the floor collapse and adjacent units, and avoid the occurrence of flood and demolition accidents.

High-rise residential. There are two pipes set up in the drainage pipe, one is thick, one is thinner, the thick one is drainage, and the smaller one is exhaust, because there are many layers, the probability of using water at the same time is large, there is air in the pipe, only one pipe is used, when the water is used at the same time, the air is mixed in the middle, the specific gravity of the water is heavy, the air will be squeezed upward, and the water that meets the upward air flow can not be discharged can only be discharged from the nearest branch pipe (household small branch), which will destroy the water seal of the anti-water bend.

Dirty air will drain from the floor.

The basin mouth is directly discharged, so a separate exhaust pipe should be set up to communicate with the main pipe to exclude the dirty air, and this exhaust pipe leads to the roof

Summary. One is the sewage pipe, which is connected to the toilet and floor drain in the bathroom, which is mainly used to drain the sewage; The other riser is actually called a "ventilation riser", normally, low-rise residential buildings only need one sewage pipe, but because the amount of sewage in the upper floors will increase, it is necessary to add another ventilation pipe.

This question is up to me, it takes a little time to type, so please be patient.

One is the sewage pipe, which is connected to the toilet and floor drain in the bathroom, which is mainly used to drain the sewage; The other riser is actually called a "ventilation riser", normally, low-rise residential buildings only need one sewage pipe, but because the amount of sewage in the upper floors will increase, it is necessary to add another ventilation pipe.

Why does the double riser 110 turn 4 half-bends with inspection ports?

Generally, they are equipped with inspection openings.

I'm asking if you don't turn half a bend and change it to a straight pipe with an inspection port? The property said that every six floors there is a four-and-a-half turn like this, what is the purpose of such an installation?

Reduce noise. Can it be changed to straight? OK.