Advantages and disadvantages of check valve in front of water meter

Check valves can prevent water from flowing back to the water meter. In this way, when the pressure rises, the water is compressed and the water meter rotates forward; When the pressure decreases, the check valve will automatically close and the water meter will not rotate.

When the pressure rises again, as long as the pressure is not higher than the pressure in the check valve, the water meter will not rotate again; The rotation of the water meter is mainly due to the repeated measurement of the water meter and the accumulation of a large amount of water. Installing a check valve can reduce the frequency of water meter rotation and also solve the problem of water meter rotation caused by pressure fluctuation.

However, due to the high frequency of domestic water and the small fluctuation of pipeline pressure, the check valve is required to have high sensitivity and high quality.

Extended data:

Case:

"The new house hasn't moved in yet, but the water meter shows that the water consumption is as high as 166 tons. Can you use so much water for decoration and occasionally watering plants? " On August 3 1 day, Mr. Mei, who lives in Ziyang, reported that the water meter in his new house was abnormal. After turning off the main tap water valve at home, the water meter still "rotates" with a reading of more than 40 tons.

On September 1 day, the relevant person in charge of the marketing department of Ziyang Haitian Water Co., Ltd. said that after receiving the feedback, the company had negotiated with the customer to solve the matter and exempted the water fee during the non-occupancy period after the renovation. In view of the common problem of abnormal water meter in high-rise secondary pressurized water supply, the person in charge also reminded high-rise residential users that if the water meter is abnormal, they should contact the water company as soon as possible and install a check valve to solve the problem.

Company: negotiated a reduction in water charges.

1 9: 40, the relevant person in charge of the marketing department of Ziyang Haitian Water Co., Ltd. introduced that after receiving Mr. Mei's feedback, the company contacted him on the morning of August 3 1 and planned to reduce the water fee during his stay after renovation.

Regarding the water fee before the renovation is completed, the person in charge said that the developer may use water when handing over the house, and the user will also use water when decorating, so it is impossible to determine whether it is caused by the "rotation" of the water meter, and other users even have water leakage in the bathroom.

"He turned off the main valve at home, but there is no valve in front of the water meter, which may be a problem with the rotation of the water meter." The person in charge said that the reason why the water meter in Mr. Mei's new house is "rotating" is abnormal is because the developer or property implements secondary pressurized water supply for high-rise residential buildings, and the pressurization is unstable, which will lead to * * * vibration of the tap water pipeline and affect the sensitivity of the water meter.