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Determining the standard slope of the sewer pipe-Part 2

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Determining the standard slope of the sewer pipe-Part 2

In the previous part, we talked about the required and standard slope of sewer pipes. We have also explained its calculation formula to you. Today we want to continue this discussion with each other.

The standard slope of each sewer pipe in the building

As in any work you should go to experts and experienced people, it is the same in building plumbing. An experienced plumber knows that he must use pipes of a certain diameter and slope for each of the pipes in the building. For example, the bathtub must have outlet pipes with a diameter of 40 mm and the slope of its pipes is 0.03, the shower has pipes with a diameter of 40 mm and a slope of 0.02.

The slope of the toilet sewer pipe

To determine the slope of the toilet pipe, attention must be paid to the type of toilet. In traditional toilets that are connected to the siphon, the siphon is installed vertically on the wall. Then, the slope of the toilet drain pipe to the siphon is considered to be at least 1% and at most 2%.
But regarding the slope of the toilet drain pipe, note that the toilet is installed on a flat surface and the toilet overflow should have a 2% slope. If you are in Toronto, you can contact NUTech Plumbing for advice on plumbing in Toronto.

Principles of urban sewage piping

In addition to the fact that you must observe the standard slope during the sewage piping, you should also consider other rules and regulations related to the principles of plumbing.

  1. The purpose of determining the slope for the sewer pipe is that whatever the diameter of the pipe, the speed of sewage movement inside it should be 70 cm per second. That is why in the formula for determining the slope, its diameter should be taken into account. Neglecting small things like this can face you with serious challenges in the future, such as slow draining of water or clogging of the building’s sewer pipe.
  2. On the horizontal and main sewer pipes, a sewer inspection valve is installed every 30 meters. For other pipes, it is necessary to install a sewer inspection valve when the pipe has a slope change, and when the slope change is more than a 45 degree angle, a sewer inspection valve must be installed.
  3. The sewage pipe of each building should be in the same building and it should not pass through the adjacent buildings. Of course, nowadays and with new constructions, this issue is a very rare case.
  4. The diameter of the pipe can be increased in the way of the sewage well, but the diameter of the pipe cannot be reduced in the entire piping route.
  5. In buildings with many floors, there is no need to install a speed limiter in the piping.
  6. After installing the sewer pipe and carrying out the piping, the pipes should be covered so that the slope does not get disturbed, and the connections in the sewer piping route should be of the 45 degree type.
  7. The slope of the pipes is between 1 and 4, and in most cases, according to the standard diameter of the pipes, this slope should not exceed 2%.

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