Non negative pressure variable frequency water supply equipment, widely used in high-rise buildings, is a pollution-free secondary water supply equipment.

Due to the susceptibility of water pools and tanks to "secondary pollution of water", long-term consumption can affect human health. Therefore, improving the water supply quality of high-rise residential buildings, raising the health standards of high-rise residents, and fundamentally eliminating "secondary pollution of water", the most effective way is to eliminate low-level water pools and high-level water tanks. The fully enclosed and pollution-free negative pressure variable frequency water supply equipment is used to directly introduce tap water into residents, allowing high-rise residents to directly drink clean tap water. The fully automatic negative pressure free water supply equipment is a complete set of secondary water supply equipment that can be directly connected to the tap water pipeline network without any negative effects on the tap water pipeline network.