Purpose of water meter valve

Water meter valves usually refer to valves installed before, after, or on both sides of the water meter, whose main purpose is to control water flow, ensure accurate measurement, and facilitate maintenance. The specific function varies depending on the installation location.
Water meter upstream valve: generally installed and managed by water supply companies, used to cut off the water supply to the entire building or unit during maintenance, replacement of water meters, or emergency situations. It does not directly participate in daily water control, but can ensure stable pressure in the upstream pipe network of the water meter and reduce abnormal rotation of the water meter caused by pressure fluctuations. ‌
Rear valve (downstream): located on the user side, it is the main control switch for household water use. When repairing pipelines, replacing water equipment, or going out for a long time at home, closing this valve can cut off the water source of the entire house and avoid the risk of water leakage. ‌
Valves on both sides of the water meter: In many households, there is a valve on each side of the water meter, and the left side is usually the main shut-off valve, used to completely cut off the water flow; On the right side is a regulating valve used to fine tune water flow, such as reducing flow during peak water usage periods to alleviate water pressure. ‌
Check valve (one-way valve): Although not a traditional “on/off valve”, it is often installed in conjunction with water meters. Its core function is to prevent water backflow, avoid water meter idling or reversal caused by pressure fluctuations in the pipeline network or gravity backflow after water stoppage, thereby ensuring the accuracy of water metering. ‌
Check valves are usually installed behind water meters, near the indoor pipeline side. ‌
In summary, the water meter valve system achieves three major functions of safety control, accurate measurement, and convenient maintenance through collaborative work