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原文：
school when someone desperately needed gasoline. We had a buddy we called the Human Siphon for his expertise at stealing gasoline from another friend's vehicle. ThePlug Valves Human Siphon would stick a tube into the gas tank of the victim's vehicle, suck on it to start the flow of gasoline and stick the other end of the tube into his own gas tank. Once the flow of gas started, gravity and vacuum took over to continue the flow. The victim never did figure out why he started getting such good mileage after graduation. In some cases, the easiest way to stop the Safety Relief Valves leak is to buy a replacement valve. This is inexpensive if it's plastic, but if it is a brass pressure breaker valve, it's much cheaper to buy a repair kit. Some plastic valves do not disassemble, so you will be forced to buy a new valve. For the more expensive pressure breaker Needle & Gauge Valves valves, a rebuilding kit costs about $30, and you can find it at home centers or nurseries.
原文来自： http://www.lvrj.com/home_and_garden/anti-siphon-valve-keeps-water-flowing-one-way-67156837.html

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译文：昂贵的压力开关阀
有了您的自动喷水灭火系统，如果水的压力显着下降，从草坪水可以通过倒虹吸管道回到您的饮用水系统。这意味着，化肥，除草剂，杀虫剂，以及其它可能会在您的草坪能发挥你的方式龙头。一个反虹吸阀是一个单向阀，以防止这一点。它可以有一个橡胶膜，防止备份，一弹簧式止回阀，或空气安全阀。在某些情况下，最简单的方法是停止泄漏购买更换阀门。这是便宜，如果是塑料的，但如果它是一个高压断路器黄铜阀门，便宜了很多购买修理包。有些塑料阀门不分解，所以你将不得不购买新的阀门。这是旧切断阀的问题，拧一男适配器（使用聚四氟乙烯在线程磁带）上的一个新问题，粘到管道该节回来。要记住，要有效，阀门必须是12以上的最高出口管道及它的下游英寸最低。对于更昂贵的压力开关阀，一包重建费用约为30美元，你可以找到在家中心或托儿所它。首先关闭水阀门和消除按住螺丝帽。阀门内将是一个塑料罩，你又逆时针删除。

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