With the increase of urban water consumption, the water groups of various cities require to increase the pipe diameter while ensuring the accuracy of flow to reduce waste, from what the citizens can get benefits. Over the years, Geko control valves and Zhejiang and Liaoning institute of metrology have cooperated long-term in the water meter durability test and device test, from the initial application in many experimental platform in metrology institute, and the usage in water meter manufacturers across the country, to the major cities’water group gradually control the flow of water''''s precision, has obtained the successful validation. At present, Shanghai water, Shenzhen water, Hangzhou water, Jilin water and Wuhan water have put into use, and are in the process of designing and negotiating with various municipal water groups in China.

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