原文：
China's pollution is serious, but also a per PLUG VALVES capita water resources in poor countries, environmental protection,PollutionPrevention and treatment, according to local circumstances and the rational management of water resources use of sewage water has become a top priority. Construction of water systems, can not only save water, and can to some extent prevent theWater pollution.
In recent years, China's urban water consumption was increasing trend in the full year, while the water quality Quecheng decreasing year by year trend, which undoubtedly brought a heavy burden on water treatment. Therefore, we should be fully in the water on the trivial. Insignificant drop of water, but the incessant drip up, the number of very substantial. Determination of water dripping, according to one hour can be set to 3.6 kilograms of water; a month can be set to 2.6 tons of water. The quantity of water sufficient MUD VALVES to supply a person's living expenses. As for the continuous flow into a line of small watershed 17 kilograms per hour, set of 12 tons per month; buzzing sound of the "big water" set of 670 kilograms per hour, set of 482 tons per month. Therefore, water-saving potential is great. Especially the urban life of its loss of water is quite amazing, urban domestic water most of the water in the construction process to complete, so to save water for urban life must be excavated to the water-saving technology in the construction applications.
A water supply system to prevent overpressure caused by a flow of water wastage measures to be taken 1.1 a reasonable limit of the pressure of the water distribution points Outflow due to overpressure caused by "invisible" waste water does not give sufficient attention. Therefore, China's current "constructionWater Supply and DrainageDesign Code, "Although the right in-home water supply branch pipe parts and the maximum pressure to make certain restrictions, but only to prevent the water from the high pressure can cause damage to the point of view, and did not prevent the overpressure from the perspective of a stream consideration. So the pressure is too loose to restrict the flow of the basic super-squeeze has REDUCING VALVES no effect. Therefore, building water supply system should be based on a flow of overpressure the actual situation of the water supply system pressure to make a reasonable limit.
1.2 Measures taken to decompression The rational allocation of water supply systems in the decompression device is a hydraulic control limits will be required, the reduction in outflow pressure limited technical support. 1.2.1Valve. Valve is a good pressure relief devices. Can be divided into proportional and direct action type. The former is based on the ratio of the area to determine the proportion of decompression, which can pre-set pressure decompression, when the water-side to stop water, you can also control the pressure by decompression of the tube does not rise, makes it possible to dynamic static decompression decompression can also be achieved.
原文来自：http://info.water.hc360.com/2009/10/200850146955.shtml

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译文：
我国污染严重，又是一个人均拥有水资源贫乏的国家，环境保护、水污染防治、依据当地水资源及情况合理进行污废水利用已成当务之急。建设中水系统，不但可以节约用水，并且可以一定程度防止水体污染。
近年来我国城市生活用水量呈足年递增趋势，而水源水质却呈逐年递减趋势，这无疑给给水治理带来沉重的负担。因此我们应该充分在节水上做文章。一滴水微不足道，但是不停的滴起来，数量就很可观了。据测定滴水在一小时可以集到3.6公斤水；一个月可集到2.6吨水。这些水量足可以供给一个人的生活所需。至于连续成线的小水流每小时可集水17公斤，每月可集12吨；哗哗响的“大水流”每小时可集670公斤，每月可集482吨。所以，节水的潜力是很大的。特别是城市生活用水其损耗是相当惊人的，城市生活用水的用水过程绝大部分是在建筑中完成的，因此要节约城市生活用水必须挖掘节水技术在建筑给水中的应用。
1防止给水系统超压出流造成水量浪费应采取的措施 1.1合理限定配水点的水压 由于超压出流造成的“隐形”水量浪费并未引起人们的足够重视。因此在我国现行的《建筑给排水设计规范》中虽对给水配件和入户支管的最大压力做出了一定的限制规定，但这只是从防止给水承压过高会导致损坏的角度考虑的，并未从防止超压出流角度考虑。因此压力要求过于宽松，对限制超压出流基本没有作用。所以应根据建筑给水系统超压出流实际情况，对给水系统的压力作出合理限定。
1.2采取减压措施 在给水系统中合理配置减压装置是将水压控制在限值要求内，减少限压出流技术保障。
1.2.1减压阀。减压阀是一种很好的减压装置。可分为比例式和直接动作型。前者是根据面积的比值来确定减压的比例，后者可以根据事先设定的压力减压，当用水端停止用水时，也可以控制住被减压的管内水压不升高，既能实现动减压也能实现静减压。
本文引用：中国减压阀网的 On the building water supply and drainage of water in water-saving technologies and designs
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