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 according to customer needs, and different manufacturers may have different classification standards for these systems.

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 tap water leaves the waterworks, it's pressurized to 0.38 MPa, which can lift 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 water travels through pipes increases, the resistance grows, and the height it can reach also correspondingly decreases. Therefore, this 38-meter height line is not parallel to the ground. However, some buildings have floors too high, which leads to insufficient water pressure and the inability to supply water further up. 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 pressure in the tap water pipeline, adding only as much pressure as needed. The equipment stops working once the tap water meets the required standard, achieving a 50% reduction. For instance, in a residential complex with six floors, during peak water usage, tap water can reach the fourth floor, while during off-peak usage, it can reach the sixth floor. The variable-frequency constant-pressure water supply equipment boosts pressure to the 5-6th floors during peak usage and goes into sleep mode during off-peak periods. In case of a power outage, the tap water's normal pressure supply can be restored. The system consumes less energy, has low operation costs, is economical to use, and saves on daily electricity expenses.