
WHAT IS A WATER PUMP?
A water pump is an electrical machine designed to convert electrical power into energy, which is then used to displace and move water. The energy generated by the pump facilitates the movement of water from one location to another.
All water pumps consist of two essential components: an electric motor and a hydraulic section. The motor generates the power needed to operate the pump, while the hydraulic section is responsible for facilitating the water flow. Additionally, a sturdy support is utilized to securely mount the pump to its base, ensuring stability and preventing any unwanted movement.
STEP 1: FLOW
At home, everyone needs water
The maximum theoretical requirement is given by the sum of the quantities of water delivered to the various outlets of a flat multiplied by the number of flats. In practice, it is common practice that just some outlets are used simultaneously: that's why this number must be multiplied to a contemporaneity factor
1 - Dishwasher
2 - Toilet flushing
3 - Shower
4 - Washing machine
5 - Kitchen sink
6 - Garden watering


HOW TO CALCULATE YOUR PUMP'S FLOW RATE

Residential buildings consumption
Apartments with two toilets
Apartments with one toilet
It shows values of actual delivery, which depend on the number of flats connected to the water-supply system. Seven outlets are hypothesized for one-bathroom flats and ten outlets for two-bathroom flats.
Method 1
Method 2
Maximum consumption at points of demand
• In theory, the water maximum requirement derives from the sum of the litres per minute delivered to the various outlets of a flat multiplied by the n. of flats.
• In practice, just some of the outlets are used simultaneously: that's why we can consider normally 1/3 of the total requirement.
Outlet
Qu. delivered (l/min)
Sink
Wash-basin
Bath-whirlpool tub
10
10
18












Shower
WC-flush-tank type
WC-fast-feed type
12
7
90












Bidet
Washing machine
Kitchen sink
6
12
12












Dishwasher
Outlet w/ 1/2" tap
Outlet w/ 3/4" tap
8
20
25













Other buildings consumption
These buildings require quantities of water greater than those needed in residential buildings. The values are based on hypothetical numbers of persons present in these buildings. These values offer a guideline and may vary in accordance with particular requirements of projects.

Number of persons present in building
A Offices B Shopping centres C Hospitals D Hotels
STEP 2: HEAD
1) Static head: