One of the principles that must be considered in urban sewage piping is determining the appropriate and standard slope of the sewer pipe. You may not know at first that this work must be engineered and calculated to the extent that the flow of sewage and sewage inside the pipe is completely smooth so that subsequent problems such as clogging of the sewer pipe and contact with pipe opening companies do not arise.
Among the things that should be taken into consideration when piping urban sewage is the standard slope of the sewer pipe and the diameter of the pipes. As a plumber who does plumbing in Toronto, we are going to point out in this article how to calculate the standard slope of sewer pipe and other drain pipes in municipal sewer piping.
What is the slope of the sewer pipe and the importance of determining it?
At the beginning and end of the sewer pipe, the highest and lowest points of the pipe are measured to the ground level, the difference between these two points is considered as the slope of the sewer pipe.
Determining the slope of the sewer pipe correctly makes the movement of fluid and sewage inside the pipe non-stop and without clogging. Exaggeration in this case is not allowed. The standard slope for sewer piping is about 2%.
Note that if the slope of this pipe is less than this value, the sewage does not move inside the pipe and the discharge is done slowly. In such cases, you mistakenly think that the sewage well is full and you have to empty the well.
If it is more than 2%, the liquid sewage moves quickly inside the pipe, and waste and solid materials remain on the inner surface of the pipe, and eventually, with the accumulation of these solid materials, the sewage pipe becomes clogged. This is the reason why you should pay attention to these things when rejecting the implementation of urban sewage piping as well as building piping.
How to calculate the standard slope of the sewer pipe
In order to determine and measure the standard slope of the sewer pipe, we must first consider whether the type of piping is under the roof or on the floor of the building. A tool called a level is usually used to measure the slope of the sewer pipe on the ground. Because the floor itself has a standard slope and you have to use a level to measure the slope of horizontal pipes.
Of course, keep in mind that the diameter of the sewer pipe is also effective in determining the slope of the sewer pipe. The principles of plumbing state that pipes of the same diameter should be used in one route or the diameter of the pipe should be increased in the sewer well route. So it seems that in determining the slope of the sewer pipe, the diameter of the pipe is one of the influential factors.
The formula for calculating pipe slope in building piping
(pipe length/100)* (height of the beginning of the pipe – height of the end of the pipe)
If the diameter of the pipe is 50 to 65, the standard slope will be 2%, for pipes with a diameter of 80 to 150, its value will be 0.1%, and for pipes with a diameter greater than 200, a slope of 0.5% will be considered. Finally, the general rule remains that the slope should be calculated in such a way that the sewage movement speed is 70 cm per second, so that you do not face the problem of clogging the sewer pipe or slow drainage.