The Essential Laws of Heat Explained

Factors that Determine Booster Pump Power, Flow and Pressure

A booster pump is quite simply a pump that may or may not have a bladder tank, and allows you to change your domestic water pressure when demand is heavy. If you have a pool, it can be good to operate at relatively high pressure, with automatic cleaners and other robots being better at eliminating encrusted dirt.
You may want to get a swimming pool booster pump for your system. But how do you determine booster pump power, flow and pressure?


Pressure is the force of the water at the discharge point in B (bars), and this depends on pump pipe cross-section. Some manufacturers also express pressure in CMW (column metres of water).

Pressure and flow are inseparable. This is a fundamental law of hydraulics: for a particular flow, a bigger-section pipe will produce less pressure compared to a smaller-section.

Discharge height

Discharge height is indicated in CMW. It’s a crucial criterion because you need to be sure about the pumped water getting to the target discharge point. Manufacturers of surface pumps typically report either a discharge height, which is the level difference between pump and discharge point, or a TMH, which is the total manometric height indicated in metres.


Flow is any water system’s key technical characteristic! The flow rate refers to how much water is pumped as a function of time.

When choosing a pump, keep in mind though that flow rate will vary on the basis of suction depth and the discharge height. For a specific diameter of pump pipe, less flow will be produced by the same pump and the height difference will be greater too.

On the other hand, the shorter the height between your suction and discharge points , the greater the flow rate. 250m3/h for every additional user. 5m3/h for 800m?.

Domestic water pressure that is considered “comfortable” is anywhere from 2 to 3 B, depending on distance from the water tower or reservoir. Therefore, properties with the most remote, “end of the line” locations can suffer from low pressure and benefit from using a booster.

If you get water from a well, look at the suction depth as well as the type of water you’re sucking up. Look at discharge height too, which is the distance from the surface pump to the water distribution site – as when you water a garden that lies high above the well. If you use an automatic watering system, make it a point to work out your required flow. Of course, more watering points mean more water required.

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