Can the kitchen drain and the bathroom drain be combined into one and drained into the sewer?

There is no clear indication in the national norms whether it is permissible or not, butCode for Design of Building Water Supply and Drainage It is mentioned in:

When domestic sewage needs to be treated by septic tanks, its fecal sewage should be separated from domestic wastewater. When there is a sewage treatment plant, domestic wastewater and fecal sewage should be discharged together. Although both end up in a septic tank, it is not recommended.

Kitchen and bathroom sewer sharing is not permitted. It's better to go alone, use it alone, and don't share it. Generally, the sewage pipe and the waste pipe are separated, and the local sanitation department can be consulted for details.

This situation is simply unreasonable, and if a legal basis is to be found, it will only depend on whether it will affect the life of the head of household in the future. Our laws have not yet been so concrete.

Sewers are a type of urban public facility that has been used as early as the ancient Roman period. The prototype of modern sewers originated in Paris, France, and Paris still has the largest urban sewer system in the world. Generally speaking, the sewer system is used to collect and discharge domestic wastewater generated in the city and industrial wastewater generated in industrial production.

It should be noted that the water coming out of the kitchen, as long as you make a reverse bend, it is best to use a U-shaped pipe to prevent the odor from returning to the room, and the two-in-one flow into the same pipe is completed.

No, the reason is that the kitchen sewage pipe, the oil pollution is serious, and after a few years, an oil layer will be formed to wrap the sewage pipe, and the normal discharge of domestic sewage is usually allowed, such as ten households using a 110 mm sewage pipe, and generally three households will use the kitchen faucet together, such a flow rate is generally about 30 mm, and the actual sewage pipe is only 30 mm after a long time, but when it rains rain, too much rain on the roof may need more than 50 mm. If the rainwater cannot be removed normally and quickly, the water level will rise, resulting in water on the second floor. Of course, it may not appear in the first few years, and the problem will slowly be exposed after a long time.

It is advisable to separate, especially if the toilet is effluent, and other sanitary appliances are wastewater, preferably to separate the waste. However, the so-called sewage and waste diversion is only done in the single building, in fact, it is still the same as the sewage well outside, so the effect is the same.

It's better not to, in case it's blocked, and the kitchen stinks.

It is possible to combine the two into one to drain into the sewer, but it is not recommended.

The reason is: the lower part of the kitchen drain pipe does not use a trap, and the bathroom will produce odor when draining, which is easy to cause odor in the kitchen.

Kitchen drains should generally be treated with grease barriers, so they should not be discharged into the sewer together under normal circumstances.

Kitchen drains and bathroom drains cannot be combined. When the snake gall is revealed, the dirty water from the bathroom may flow into the kitchen, which will make people feel disgusting. And the two really can't be combined in comparison.

There are bathrooms. The water used for bathing can be recycled into reclaimed water, and most of the kitchen is free sewage that cannot be recycled, so the two cannot go together, and should be separated separately, which is the correct construction strategy.

Generally, it needs to be separated, and oil stains can easily clog the sewer pipe.