No negative pressure means that a device for reducing negative pressure is installed at the water inlet of the equipment with the help of tap water from the municipal pipe network as the water source. This kind of equipment is commonly used in life, mainly to solve the problems of insufficient water pressure and small water volume in high-rise buildings. This is a new type of water supply equipment, which is connected in series with the tap water pipeline, making the equipment more energy-saving.

Non-negative pressure equipment:

Usually, what we call non-negative pressure water supply equipment generally refers to non-negative pressure frequency conversion water supply equipment, also known as frequency conversion non-negative pressure water supply equipment, which is a pressurization equipment directly connected to the water supply network. The traditional water supply method can not be separated from the reservoir, and the water in the reservoir is usually supplied by the tap water pipe, so that the pressurized water becomes zero after entering the reservoir, resulting in a lot of energy waste.

Refer to the above? Baidu Encyclopedia-No negative pressure