Is it better to have a trap in the bathroom sewer pipe or not?

I went to deal with an after-sales problem today. The owner has just lived in the new house for a few months, and the washbasin in the bathroom was changed to a wall row. He called me two days ago and said that the wall row was blocked.

I checked the pictures of the water and electricity changes at that time, and the path and length of the pipes were all correct. The owner said that he should try to find a floor drain first, and then contact me if it doesn’t work.

He called me yesterday afternoon and said that he had hired a professional plumber for launching the water. He used the machine to pass 1.2 meters in, and then it stopped working. Before the launch, the water could flow slightly, but now it does not flow at all.

When looking at the water and electricity pictures, I found that this floor drain has a water trap. The one I saw in the owner’s house is upstairs, and the water trap of the owner’s house is downstairs.

I asked the owner if he had gone downstairs to open the inspection port of the water trap, and the owner said no.

According to the length of the sewer pipe, analyze the cause of the water blockage, and it is likely to be in the trap.

The owner asked about the time of the owner downstairs, and made an appointment to take a look this morning to treat the sewage.

When you arrive at the scene, go directly downstairs to open the integrated ceiling, unscrew the inspection port on the water trap, put water upstairs, and there is no dripping downstairs, indicating that the problem lies here.

We used our own small bucket to find a piece of iron wire and poked it up from the water trap, and with a bang, something went down. There is a rubber thing, and some hair, rinse the access port and screw it on, and the water upstairs will be smooth, and the problem will be solved.

The owner said that it cost 100 yuan for nothing. I haven’t found the root, it seems that professional water is not professional.

Through this matter, I will talk to you about whether it is necessary to install the trap of the water pipe?

Everything has a good side and a bad side. The biggest advantage of the water trap is that it can prevent odor. No matter what floor drain you use in your home, the sewer pipe with the water trap will never reverse the odor.

The disadvantage of the water trap is that there are two big bends, which have a great impact on the drainage speed. If it is normal sewage, there is no problem. If it is slower, it will be slower, but if you accidentally fall in something. Especially those with heavier weights will sink to the depths of the trap, which may block the water outlet for a long time. For example, the owner’s house we went to in the morning fell into something. The hair that got in got blocked with a piece.

From this point of view, the water trap is not as good as the 90-degree elbow. Even if a 90-degree elbow falls into something, it can basically be washed away by putting a little more water.

Therefore, there is no need to add water traps deliberately. The developer has already brought them, so they will continue to use them. There is no need to go downstairs to add them.

If you go downstairs for construction, you have to negotiate with the owner downstairs, and you need to go downstairs to repair it, causing trouble for others.

The sewer pipe is 90 degrees. Even if it is blocked, it can be opened by the machine that opens the water. With the trap, the machine that uses the sewer is likely to be unable to open. .