How to change the water meter for six years?

It is best to change the water meter once every six years.

"According to the national metrological technical regulations, domestic water meters must be used within six years and must be rotated when they expire." Liu Chunhui, an engineer from Qingyuan Bureau of Quality and Technical Supervision, said that the rotation fault is not unusable, but it can be used after testing, but it cannot be used. Used in the same place.

Liu Chunhui said that water meters can generally reflect the rapid development of water meters, such as the metering characteristics of different water meters, nonstandard installation specifications, water quality, water supply pressure and usage. Just move into a new house. When the air pressure or water supply pressure is not constant, the running speed of the water meter may be accelerated; If the upper secondary water supply system is not complete, it will lead to the change of water pressure and accelerate the operation of water meter; If the water quality is not good, it will produce scale. The "pipe" inside the water meter will become thinner and thinner, so when the water flows through the twisted pipe, the speed will increase. "Seems to be used to water the flowers. If you pinch the water, it will spray far away. "

Extended data:

When replacing the water meter, we should first consider the working environment of the water meter, such as water temperature, working pressure, working time, measuring range and water quality, and then make the pressure loss of the water meter close to and not exceed the specified value according to the design flow of the water meter. Generally, when the nominal diameter is not greater than DN50, a rotary water meter should be used. When the nominal diameter is greater than DN50, a rotary water meter should be used; When the flow of water meter changes greatly, double-headed water meter should be used.

Water meters with a nominal diameter of not more than DN50 should be replaced by secondary flow designed for water supply system.

It is recommended to replace the dry water meter first. In non-heating areas stipulated by the state, domestic water meters in indoor public places with the lowest temperature below -4℃ or water meters near the northwest water wall should use dry water meters. . If a wet water meter is used, it should be insulated.

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Baidu Encyclopedia-People's Republic of China (PRC) and National Metrology Law