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

I believe many of you are familiar with the concept of 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 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 that height, theoretically, the water from the waterworks can directly flow into residential homes through the pipes.

But some terrain varies, and as the distance of the running water in the pipes increases, the resistance also grows, and the height it can reach is correspondingly reduced. Therefore, this 38-meter height line is not parallel to the ground. However, for some buildings with excessively high floors, this can lead to insufficient water pressure, preventing continued supply to higher floors. That's why many high-rise buildings initiate secondary water supply. From which floor does the secondary water supply for high-rise buildings start?

Utilize the existing water pressure in the municipal water pipes, compensating for the difference as needed. The system stops working once the tap water meets the required quality, achieving a 50% reduction. For instance, in a residential complex with a 6-story building, 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 to the 5-6th floors during peak usage and enters sleep mode during off-peak times. In case of a power outage, the system can restore normal water pressure, consuming less energy and resulting in low operational costs. It is cost-effective and saves daily electricity expenses.