Sewer backwater causes, why does sewers backwater?

There are three reasons for backwater in kitchen drains:

1. Poor hydraulic conditions.

Residential drainage is generally gravity self-flowing drainage, and sewage is discharged from the sanitary appliances of the house into the drainage riser and then into the drainage trunk. Finally, it is discharged into the outdoor drainage inspection well. The drainage speed of the general drainage riser is greater than that of the drainage horizontal trunk pipe, and when the sewage is discharged to the bottom of the drainage riser and transferred to the drainage horizontal trunk pipe, it will produce instantaneous congestion, and a positive pressure water column will be formed at the bottom of the drainage riser for a short time, if the hydraulic conditions are not good, (such as the drainage riser and the drainage horizontal trunk pipe are not connected with two 45??).

When the positive pressure water column is higher than the sanitary appliances of the ground floor residence, the sewage overflows from the sanitary appliances of the ground floor house, which is commonly called sewer backwater.

2. Pipe problems.

In the past, the drainage pipes of residential buildings were generally sand mold cast iron pipes, with rough inner walls, easy to hang dirt, and easy to rust if the anti-corrosion was not done well, resulting in poor drainage. The inner wall of the plastic drainage pipe and the mechanism centrifugal cast iron pipe is smooth, and the dirt is not easy to hang up and cause blockage, and the water passing capacity is 10% 26% larger than that of the sand mold drainage cast iron pipe. Local construction committees have explicitly prohibited the use of sand mold drainage cast iron pipes in new residential projects, and promoted the use of plastic drainage pipes and mechanism centrifugal cast iron pipes.

3. The settlement of the house is large.

During residential construction, the slope of the drainage trunk pipe generally meets the standard slope, and the flow rate of sewage in the pipeline can reach the self-purifying flow rate. It is normal for the house to settle due to its own weight and unreal foundation when it is first built, but it is not attached great importance to the design and construction, and corresponding measures are taken, resulting in a large amount of house settlement, and the drainage outlet pipe is pressed, resulting in the reduction of the slope of the drainage outlet pipe, or even the reverse slope, and the drainage outlet pipe will be crushed when it is serious, resulting in poor drainage.

If the downstairs is blocked, the sewage used in your home will only overflow from the downstairs instead of your home, so it is better to seize the time to find professional tools to get through, so as not to affect the neighbors.

Supervisor blockage problem on the ground floor

Usually, the first floor is a separate sewer with low water pressure, so it is not easy to clog. The kitchen sewer on the first floor is backwater, and the first thing to judge is to judgeWhether it is caused by the blockage of the main plexus, I came across a situation becauseThe flux is not enough to produce water similar to chokingThe effect of such wordsExtending the sewer pipes can make a difference.

What should I do if the sewer on the first floor is blocked and the water backs up?

1. If the anti-water isDue to a clogged sewer, that's mainly becauseDredging is not carried out on a regular basisYou can directly find the property company to dredge the pipes, able to solve the trouble of anti-water.

2. Or we canUnclog the sewers yourself at home, with caustic soda dredging, the effect is still very good. We can also boil another pot of hot water before dredging, pour the caustic soda into the drain, and then pour the boiling water directly into it. Basically, the phenomenon of blockage is not particularly serious, or it does not take long, it can be directly dredged.

3. Because the flux is not enough, Bi Zheng loss will produce an effect similar to choking water, in this caseExtend sewer pipes

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Do-it-yourself extension.

In addition, to elaborate, the kitchen sewer backwater caused by the blockage of the sewer pipe, the blockage is also divided into two situations:

1.The kitchen drain is backwater when you use it, and it belongs to your own pipe blockage, so you can dredge it with a small dredging machine.

2.If you are backwater when you don't use water, the main pipe of the whole building is blocked, and the kitchen sewer pipe is easy to form grease, so you may need to ask a professional master to clean the pipe, which is more thorough.

In addition to the above reasons, the hydraulic conditions, the pipes used for the sewer pipe can also affect the drainage of the kitchen sewer:

1.Residential drainage is generally gravity self-flowing drainage, the drainage speed of the drainage riser is greater than that of the drainage horizontal trunk pipe, and when the sewage is discharged to the bottom of the drainage riser and transferred to the drainage horizontal trunk pipe, the drainage speed will be slowed down, especially when the water volume is large, it may cause instantaneous congestion. Sewage forms a short period of positive pressure water column at the bottom of the drainage riser, if the hydraulic conditions of this part are not good, the positive pressure water column is formed relatively high, when the positive pressure water column is higher than the kitchen and bathroom appliances of the ground floor residence, the sewage overflows from the kitchen and bathroom appliances of the ground floor residence, that is, the sewer water is usually said to be the situation of sewer backwater.

This is generally caused by unreasonable drainage design.

2.The inner wall of the pipe can also affect the quality of the drainage. For example, in the past, the drainage pipe of the house usually used sand mold cast iron pipe, the inner wall of this pipe is relatively rough, which is easy to cause dirt "retention", and if the anti-corrosion is not done well, it will eventually lead to rust of the pipe, resulting in poor drainage.

If the problem of water backwater in the ground floor house is very serious because of the pipe problemIt is necessary to renovate the original drainage pipes and replace them with pipes with smooth inner walls that are not easy to hang dirt, and plastic drainage pipes or mechanism centrifugal cast iron pipes are the two most commonly used now.

Reason 1: Ignoring the sewer dredging during decoration may have foreign objects or decoration cement solidification and blockage

Everyone must listen to my advice, because it is not a matter of money, it may affect the relationship between the neighbors, although I say, you and your neighbors are leaking, it is also related to this, so if your upstairs neighbors are decorating, don't be afraid of trouble, go and say a word about the sewer, so as not to threaten the roof of your home in the future.

Reason 2: Long-term to heavy oil caused by grease solidification to a certain thickness, resulting in pipeline blockage

Promote here, one is to eat hot pot oil, boil the soup base, don't go directly into the sewer, take out large pieces of food, pay attention to throw away from a large number of food processing, garbage bags, and in accordance with the requirements of garbage classification, because hot pot soup, soup, and vegetable juice contain a lot of salt and oil, and all kinds of sugar flow into the sewer for a long time, and when you encounter cold water, the water will become thicker and thicker, just like you can't pull garbage for a long time. (Many bugs, flying insects, cockroaches, water rats have fallen out of the tubing.) ）

Reason 3: Long-term accumulation of hair, body sebum, dander, dust, clumps, etc., leads to blockage

This problem often occurs in the sink, bathroom, bathtub, toilet, washing machine drain near the drainage, some friends have consciously begun to put hair isolation stickers near the drain, or will encounter the problem of hair accumulation blocking the sewer, this thing is normal, because the filter sticker treats the symptoms but not the root cause, although it is a little useful, but can not solve the fundamental problem, among which the toilet is easy to block the reasons are more, more complicated, each family is different, In addition to the problems mentioned earlier, there may be problems with the engineering design of the building itself, but also the problems caused by humans are more common.

The reason why the sewer is blocked is that there is garbage gathered together, which leads to the restriction of the sewer pipes, and the water flow cannot flow smoothly, resulting in an increase in the water pressure on the blocked side, forming backwater.

This is usually due to the accumulation of a lot of large garbage in the sewers, which will be congested and backwater after a long time.

Ignoring the sewer dredging during decoration may have foreign objects or decoration cement solidification and blockage; For a long time, the grease caused by heavy oil solidifies to a certain thickness, causing the pipeline to clog.

1. The biggest reason for the problem of backwater in the sewer pipeline is that the pipeline has been blocked, resulting in its pipe wall becoming thicker and thicker, and it cannot be discharged in time when draining, but will cause the phenomenon of backwater. If the blockage of the public sewer pipes occurs, most of them occur when it rains, especially when it rains, and a lot of water accumulates in the pipes, which cannot be discharged in time, so it will lead to the problem of backwater in the pipes.

2. Solution: Most of the backwater in the sewer pipe is due to the problem of blockage in the pipeline, so we only need to solve the problem of blockage. After some pipes are used for a long time, some scale will appear, and there are more impurities in them, so it is necessary to clean the pipes regularly.

For example, by adding baking soda to white vinegar solution, or directly buying caustic soda and dredging agent, after pouring it in, it can play a role in dredging the kitchen drain or toilet drain. It needs to be cleaned regularly to avoid clogging and backwater.

As for the problem of water reversal in the sewer, it is mainly because the pipe used below is more urgent, and the amount of water above is relatively large, so that the drainage is not timely, which leads to the phenomenon of backwater.

First of all, between the main pipe and the drainage pipe made in the bathroom, it is about 15 cm down from the ground, but below 15 cm, it is likely to go directly to the outside, so this position of about 15 cm forms a water outlet position.

Then the elbow that goes out under the floor slab may be a 90-degree elbow, so many people upstairs will form a phenomenon of untimely water flow when they use water collectively.

However, at this time, the water in the elbow upwards will slowly accumulate, even exceeding 15 cm, so the phenomenon of anti-water will be formed.

If the sewer is clogged or backwatered, it will affect daily life, so it is necessary to find a way to solve it. So what is the reason for the sewer backlash? PChouse will take you to find out.

Generally, the backwater in the toilet sewer is likely to be due to the blockage of the sewer, or it may be due to calcification in the sewer pipe, resulting in a smaller pipe outlet. Sewer backwater is a blockage of the main pipe, and sewer blockage is a very common problem in daily life.

1. If you accidentally fall into a foreign object or cause blockage caused by a mistake in the newly installed pipeline during daily use, you generally use a pipeline dredging machine to directly dredge or replace the pipeline;

2. Some sewer pipes will be scaled after a period of use, which makes the inner diameter of the pipeline thinner and affects the normal sewer discharge, this dredging must use high-pressure water to clean the pipeline, remove the dirt on the inner wall of the pipeline, expand the inner diameter of the sewer pipe, and dredge the sewer. This condition is the most common in kitchen drains. Most sewers have measures to prevent backwater.

The kitchen sewer can replace the pipe, poke and stir method, water pressure method, and dissolution method.

1. Replace the pipeline.

Plumbing problems In the past, the drainage pipes of houses were generally sand molded cast iron pipes. The inner wall is rough and prone to hanging dirt. Anti-corrosion is not easy to rust, resulting in poor drainage. The inner wall of the plastic drainage pipe and the mechanical centrifugal cast iron pipe is smooth, and dirt is not easy to accumulate, causing clogging.

2. Poke and agitation method.

This is the most direct solution, since the pipe is blocked, just poke the blockage open, if it is chopsticks, spoons and other hard objects, you have to hook it out.

3. Hydraulic method.

When the drain is filled with water, press down with a leather plug and lift it violently, so that a certain pressure and pumping force will be formed, which may wash away the clogged debris.

4. Dissolution method.

The main reason for the blockage of the sewer pipe is that the grease adheres to the inner wall of the pipe, making the pipe narrower and narrower, and finally it is easy to be clogged by fine crumbs and rice grains.

There are several reasons why a sewer backs up: a clogged sewer pipe or a sewer pipe outlet that is too low.

The solutions are:

1. If it is a pipe blockage problem, it should be dredged in time, otherwise it is easy to cause peculiar smell, and even there is a possibility of bursting due to the continuous accumulation of dirt.

2. If the outlet of the pipeline is too low, resulting in frequent backwater, the sewer pipe should be reinstalled.

Answer: If there is a backwater situation when the residents on the first floor use the sewer by themselves, then it means that the drainage pipe on the first floor is blocked, and you can use a dredging agent or dredging machine to help dredge the pipe, or if it is more serious, you need to contact a professional worker to repair and deal with it. 2. If there is a backwater situation when the residents on the first floor do not use the sewer, then it is likely that the main drainage pipe of the building is blocked, and in this case, a high-pressure water truck is required to impact the sewer pipe, and the dirt on the pipe wall is removed through water pressure and the sewer pipe is dredged. 3. It is also possible that the underground shaft is blocked and the outlet of the drainage channel is closed, coupled with the drainage from the upper floor, the pressure is generated in the sewer pipe, resulting in the sewage in the pipe being back-pressed, and the main thing is to confirm whether the angle of the pipe elbow of the house sewer into the sewer main pipe is correct.

The water pipes are not clogged and there is no backwater.