Water supply equipment plays a crucial role in addressing the pressure issues of daily life water supply. Many high-rise residential complexes, schools, factories, hotels, inns, and rural areas all require secondary water supply systems. The selection of water supply equipment varies according to customer needs, and each manufacturer has different standards for categorizing such equipment.

I believe many of you are familiar with secondary water supply! The tap water we use in our daily lives is transported to our homes through pipes. The water transported through pipes is generally under pressure; when the tap water leaves the waterworks, it is pressurized to 0.38 MPa, which can elevate the water to a height of 38 meters. Therefore, for floors below this height, theoretically, the water from the waterworks can directly flow into residential homes through the pipes.

But some terrain varies, and as the distance water travels through pipes increases, so does the resistance, resulting in a lower height it can reach. Therefore, this 38-meter height line is not parallel to the ground. However, some buildings have floors that are too high, which leads to insufficient water pressure and the inability to supply water upwards. That's why many high-rise buildings initiate a secondary water supply. From which floor does the secondary water supply for high-rise buildings start?

Utilize the existing pressure in the municipal water pipes, compensating as needed; the equipment stops when the tap water meets the required standard, achieving a 50% reduction. For instance, in a residential complex with 6 floors, during peak water usage, the tap water can reach the 4th floor, while during off-peak usage, it can reach the 6th floor. The variable frequency constant-pressure water supply equipment boosts pressure for the 5th to 6th floors during peak usage and enters sleep mode during off-peak periods. In case of a power outage, normal water pressure can be restored, with low energy consumption and low operation costs, making it economically efficient and reducing daily electricity expenses.