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How does pressure change from the point of consumption to the point of water intake?

Anna

Topic created April 2, 2019

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Good day! A small apartment 3-storey residential building was equipped with a special water tank for the developer (it is filled by gravity) and a pumping station. After 4 years, the station began to work poorly. I live on the top floor. Now, when you open the tap, you have to wait until at least a trickle of water appears. It is clear that either a major repair or replacement is needed.

But the question is - how much does the pressure in the system change due to the distance (from the point of consumption to the point of water intake)? Which station would be best suited for such a house? Thank you for your possible answers.

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Expert
Nikolay Fedorenko
Expert
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Good afternoon, Anna. Unfortunately, it is impossible to make any calculation from the indicated data.
A lot of input data affects pressure loss:
- the horizontal distance from the filler to the farthest mixer, respectively, the vertical distance to the farthest tap;
- the number of apartments in your house and the estimated number of residents. Consumption per person is considered 36 liters / minute;
- place of installation of the tank and pump station;
- the diameter and material of the pipes directly affect the loss;
- the number of bends, turns also affect the decrease in pressure in the overall system.
The attached table provides guidance for you. There is a very rough formula for calculating the vertical loss, it sounds like this: 10 meters horizontal is 1 meter vertical. Only suitable for pipes with a diameter of 20 mm (internal 16 mm).
I note that the larger the diameter of the water pipe, the higher the pressure in the tap. Experiencing less resistance in the pipes, the pressure increases. One of the possible options for arrangement can be considered in the figure.
Your question requires serious calculations based on specific conditions and initial data. Recommending a suitable station will be a hoax on our part.
there is article about the construction of a water pumping station in a private house - read, it will be quite relevant for your case.
Attached photos:

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