Water meter rotation prevention guide
With the development of urban housing construction, the urban water supply water meter has gradually changed from the original general meter and unit meter water supply method to the centralized management method of one water distributor, one household and one meter. The phenomenon of rotation metering.
Water meter rotation? More than 100 tons of water is used up in the empty house. Have you ever encountered this situation?
In our life, small losses caused by the rotation of water meters are often ignored. Today we will talk about the reasons for the rotation of water meters in detail.
Types of water meter rotation
Rotation due to network fluctuations
▌The water surface of the municipal water supply part rotates in a large area
In recent years, with the increase of secondary water supply facilities, many high-rise residential quarters and nearby municipal water supply users have experienced large-scale water meter rotation.
After investigation, some communities use non-negative pressure water supply equipment. When the water pump is started, it is equivalent to pumping water directly from the municipal pipeline, causing the pressure of the municipal pipeline network to fluctuate, so as to affect the water meter measurement of the surrounding direct supply users.
▌A small amount of rotation of the water meter of the Municipal Water Supply Department
For the direct supply part of the water meter rotation caused by the pressure fluctuation of the municipal pipe network caused by the frequent opening of the secondary water supply facility with a large flow of water,
In the case of few rotating water meters, a check valve can also be installed in front of the water meter to prevent the pressure fluctuation of the pipe network from being transmitted to the back of the water meter to solve the problem of water meter rotation. Ensure that the check valve is installed on the premise of not affecting the normal water use of the user.
▌Insufficient spacing of water meter pipes leads to water meter rotation
At present, most of the household meters are installed with multiple water meters in the same water meter well. There are situations such as too thin branch pipes, too small distance between water meters, and not long enough straight pipe sections before and after.
In the case of one of the households using water, due to insufficient water flow through the branch pipe, a negative pressure is formed near the water user's branch, and the water pressure distribution balance between the water meters is broken.
The stored water behind the remaining user water meters is returned to the branch to form the water meter inversion. When the water consumption is stopped, the pressure in front of the remaining user water meters will rise, and the liquid after the compression of the meter will form a forward rotation, and finally the water meter will rotate.
For the existing water meter rotation, it can be solved by installing a check valve in front of the water meter.
For new installations, users can prevent it by increasing the diameter of the branch pipe and leaving enough space between the left and right of the water meter.
Rotation of the water meter due to the presence of air in the pipe
▌The pressurized part of the water meter rotates
For the large-area water meter rotation that exists in the pressurized part of the user, it is mainly caused by the existence of gas in the pressurized part of the pipeline. During the operation of the pressurized pump, the pressure fluctuates and the compressed gas is caused. By installing an exhaust valve at the end of the partition layer, the exhaust valve can be exhausted. The valve discharges the gas in the pipeline to be resolved.
▌The rotation of the water meter caused by the presence of gas in the pipeline in the user's home
As for the rotation of individual users' water meters in the community, it is found that most of them are caused by not using water for a long time and the gas in the pipeline cannot be discharged. The gas in the pipeline can be discharged by opening the faucet above the water or closing the water meter valve. way to be resolved.
▌Water meter rotation due to pipeline laying
In the marketing work, it was found that there are some water meter rotations that cannot be solved by the exhaust gas,
After investigation, it was found that there was a stagnant water pipe at the highest point of the user's pipeline, and there was gas in the stagnant water pipe, and the gas could not be discharged by opening the faucet.
For such cases, the user can solve the problem by eliminating the dead water pipeline or installing a check valve in front of the water meter.