Sewer pipes: calculate slope


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Sewer pipes: calculate slope

Wastewater is a big problem of our society. Inappropriate disposal poses a risk to health. Therefore, sewer pipes are an integral part of the supply system of a house.
In order for the sewer pipes to perform their function, proper installation is a must. Important is the calculation of the gradient. Without gradient, the wastewater is not removed from the pipes. It stays in it until the pipe is filled so far that the wastewater is displaced for this reason. Clogs and bad stink, yes, maybe even vermin infestation would be the result.
The wrong calculation of the gradient and its consequences
Depending on the purpose, several types of sewers are known. The sewers are among the so-called horizontal pipes. The gradient is needed to empty it. This is called gravity drainage.
The gradient influences the degree of filling of the pipes. If the slope is too big or too small, a number of disturbances can occur. Deposits in the pipes, which ultimately lead to a blockage, unpleasant odors, gurgling and clucking noises as well as a full filling of the pipes are the most common problems with a wrong one
calculated gradient may occur.
How is the slope calculated correctly?
When calculating the slope, the inclination of the pipe plays a major role. For example, if a sewer pipe is 25 meters long and has a height difference of 37.5 centimeters,
the gradient is 1.5 percent. Depending on how you want to calculate the gradient, there are several methods.
You can calculate the gradient in percent, you can express the slope in the tilt ratio or you can determine the gradient in centimeters / meters as a height difference. Which calculation is suitable depends on which information you have available and which result you can easily implement.
In the above example you can do some calculations based on the known information. For the percentage gradient, divide the height difference by the length of the line and multiply by 100.
For the gradient in meters, the height difference is simply divided by the length of the pipe. In the end, this results in a result for our example of 0.015 meters. This means that over a length of one meter, the height difference must be 0.015 meters.

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