Water pressure refers to the pressure of water. When a container is used to hold water, due to the action of gravity, there is a pressure equivalent to so much weight acting on the wall and bottom of the container. The water contained in the container exerts pressure on the side and bottom. For surfaces in any direction, the pressure is always perpendicular to the contact surface. And when the depth is the same, the pressure is the same; The deeper the liquid, the greater the pressure.

The ratio of the pressure on an object to the stress area is called pressure, which is used to compare the influence of pressure. The greater the pressure, the more obvious the effect of pressure.

The calculation formula of pressure is: p=F/S, the unit of pressure is Pascal (abbreviated as Pa), and the symbol is PA. The methods of increasing pressure are: increasing pressure under the condition of constant stress area or reducing stress area under the condition of constant pressure. The methods of reducing pressure are: reducing pressure under the condition of constant stress area or increasing stress area under the condition of constant pressure.

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Generally, the tap water pressure is about 0.7 kg, and 1MPa is equal to 10 kg. 1MPa= 10kg/ cm2, and MPa MPa is the new unit. According to the tap water supply specification:

Generally speaking, the tap water is 0. 1MPa = 10m, and the water supply pressure at the end of the pipe network stipulated by the state is 0. 14Mpa. More intuitively, 0. 1mpa is equivalent to a standard atmospheric pressure, and the water supply pressure at the end of the pipe network is 0. 14Mpa, which is equivalent to the faucet leaving the water supply tower (pool). Therefore, the higher you live, the lower the water pressure will be.