防回流阀

Keeping water free of contaminants\r\n

Backflow is water that flows backwards into our pipes after a property has used it. It may carry contaminants that can harm people's health. That's why all connections to our water and recycled water pipes – including fire service connections – must be protected with devices for backflow prevention containment. Property owners are responsible for getting the right kind of backflow device installed.
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保持水不受污染

回流是指在物业使用后,水回流到我们的管道中。它可能携带有害人体健康的污染物。这就是为什么所有与我们的水和再生水管的连接,包括消防连接,都必须用防回流密封装置进行保护。业主有责任安装正确的防回流装置。


How backflow occurs\n

Backflow occurs when water from a customer's property flows backwards into our pipes. This may carry contaminants that can harm people's health. Backflow is more likely to occur:

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  • if there's a drop in pressure in the main, for example during a main break
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  • if water pressure at the property is higher than at the main, for example if a pump is operating on the site.
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Contaminants may enter the drinking water system through a cross connection caused by:

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  • faulty plumbing
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  • hoses submerged in buckets, tanks or pools.
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Cross connections are unauthorised plumbing connections between 2 water sources that should be separate, for example a drinking water system and a recycled water or wastewater system.

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回流是如何发生的

当水从客户的物业倒流到我们的管道时,就会发生回流。这可能会携带有害人体健康的污染物。回流更容易发生:

  • 如果主管道压力下降,比如主管道破裂时
  • 如果物业的水压高于主水管的水压,例如,如果现场有一台水泵在工作。

污染物可能通过交叉连接进入饮用水系统,原因如下:

  • 有缺陷的管道
  • 水管浸在水桶、水箱或水池中。

交叉连接是指未经批准将两个应分开的水源连接起来的水管,例如饮用水系统和循环水或废水系统。

防回流密封装置阻止潜在的污染水回流到我们的水管。

被污染的水会带来严重的风险
污染物可能包括化学品、石油、细菌、泥浆和碎片。


What backflow devices are\r\n

Backflow prevention devices stop water flowing back into our pipes. They have one of the following elements to stop water flowing backwards:

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  • a valve that only lets water go in one direction
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  • an air gap
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  • a break tank.
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These devices are important as they protect our water quality, and the health of people using it.

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什么是回流装置

防回流装置阻止水回流到我们的管道。它们有以下元素之一来阻止水倒流:

  • 只让水往一个方向流动的阀门
  • 气隙
  • 破水箱。

这些设备很重要,因为它们保护了我们的水质,保护了用水者的健康。


What you must do\r\n

Property owners are responsible for getting the right kind of backflow device installed. If you're the property owner, you need to ensure:

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  • you have the right kind of backflow prevention device installed at your property
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  • the device is properly maintained. 
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Assess the hazard rating 

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You must engage an accredited backflow plumber (a licensed plumber with a backflow accreditation) to assess your site's hazard rating. They need to assess the hazard rating every time site activities change. Tell them if your property has more than one connection to our water main. This may affect your hazard rating and the type of device the plumber must install.  
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Install the device 

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You must get a licensed plumber to install the right kind of device. You're responsible for ensuring your plumber sends us a certificate of compliance when they install high and medium hazard devices.
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Test the device

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Your accredited backflow plumber must test high and medium hazard devices when they're installed and every year afterwards.
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Send us the results

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Ensure your accredited backflow plumber sends us the results within 2 days of the test.

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你必须做什么

业主有责任安装正确的防回流装置。如果你是物业所有者,你需要确保:

  • 您的物业安装了正确的防回流装置
  • 设备维护正常。

评估危险等级

您必须聘请一个合格的回流管道工(具有回流认证的持牌管道工)来评估您的场地的危险等级。每次场地活动发生变化时,他们都需要评估危险等级。告诉他们你的房子是否与我们的总水管有多个连接。这可能会影响你的危险等级和水管工必须安装的设备类型。

安装设备

你必须找一个有执照的水管工来安装正确的设备。你有责任确保你的水管工在安装高、中危险设备时向我们发送合格证书。

测试设备

你们认可的回流管道工必须测试高和中等危险的设备安装的时候和以后的每一年。

把结果发给我们

确保您的认证回流管道工在测试后2天内将结果发送给我们。


What type of backflow device you need\r\n

Your backflow device must be suitable for your property's hazard rating. A hazard rating measures whether your property is a high, medium or low hazard to our water supply system. Your accredited backflow plumber will assess your rating. Examples of hazard ratings for different businesses are shown in the Australian Standard, AS/NZS 3500:1.
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Low hazard properties

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Owners of low hazard properties must get a non-testable backflow prevention containment device installed. Our 20mm and 25mm meters have a simple backflow prevention device in them. These are suitable for low hazard connections.
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\r\nYou must get a separate device installed if you have:

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  • a larger meter
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  • an unmetered water connection
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  • a high or medium hazard rating.
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Medium hazard properties

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Owners of medium hazard properties must get a testable double check valve assembly installed. 
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High hazard properties

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Owners of high hazard properties must get a registered break tank, reduced pressure zone or registered air gap installed.
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Metered standpipes

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If we've given you permission to use a metered standpipe on our pipes, your standpipe must have a testable double check valve incorporated into its design.
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Construction sites

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You need a backflow prevention device on water main connections you use for construction and renovation.

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If you're building more than a single standalone house, we consider it to be a high backflow hazard.
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Sprinkler and fire services

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If your property has separate sprinkler and fire services, you must get a testable double check detector assembly. It must be installed near where the water service enters your property or upstream of any booster assembly or off-take from the fire service. 
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\r\nIf your property has a window or wall drencher system, you must install a non-testable low hazard device.
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Unknown hazard rating

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If you don't know your site's hazard rating or don't get it assessed, we'll assume it's a high hazard. Owners of properties with unknown hazard ratings must get a registered break tank, reduced pressure zone or registered air gap installed.

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你需要哪种类型的回流装置

你的防回流装置必须适合你的财产的危险等级。危险等级衡量您的财产对我们的供水系统是高、中或低的危险。您的认证回流管道工将评估您的评级。澳大利亚标准AS/NZS 3500:1列出了不同企业的风险评级示例。

低危害特性

低危险物业的业主必须安装不可测试的防回流密封装置。我们的20毫米和25毫米里面有一个简单的防回流装置。这些适用于低危险连接。

你必须安装一个单独的设备,如果你有:

  • 更大的仪表
  • 无表的水连接
  • 高或中等危险等级。

中等危害特性

中等危险特性的所有者必须安装可测试的双止回阀总成。

高危险特性

高危险物业的业主必须安装注册的破罐、减压区或注册的气隙。

计量硕大而

如果我们允许你使用计量竖管在我们的管道上,你们的立管必须在其设计中包含一个可测试的双止回阀。

建筑工地

你需要在建筑和装修用的水主连接上安装防回流装置。

如果你建造了不止一套独立的房子,我们认为它有很高的回流风险。

洒水和消防服务

如果您的财产有独立的洒水和消防服务,您必须得到一个可测试的双止回检测器组件。它必须安装在水服务进入您的财产附近,或任何升压组件的上游或从消防服务的起飞。

如果您的房屋有窗户或墙壁的雨淋系统,您必须安装一个不可测试的低危险设备。

未知危险等级

如果你不知道你的网站的危险等级或不进行评估,我们会认为它是一个高危险。危险等级未知的房屋的业主必须安装注册的破碎罐、减压区或注册的气隙。


Who can fit your device\r\n

You must use accredited backflow plumbers and licensed plumbers. 

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  • An accredited backflow plumber must assess your site's hazard rating and test your backflow device. Search for an accredited backflow plumber
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  • licensed plumber must install your device. NSW Fair Trading licenses plumbers in NSW.
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谁能安装你的设备

必须使用经过认证的倒流水管工和持牌水管工。


What we will do\r\n

We keep a register of all installed testable backflow prevention containment devices. We'll remind you when it's time to get your backflow device tested each year.
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\r\nWe audit a sample of installations to make sure they comply with Australian Standard AS/NZS 3500:1. If your installation doesn't comply with the standard, we'll send a notice asking you to repair, maintain, test or replace the device. 
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\r\nIf you don't comply with our backflow requirements or notices, we may:

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  • restrict your water supply
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  • disconnect you
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  • charge you any costs we incur to make your connection satisfy our requirements.
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我们要做什么

我们对所有已安装的可测试防回流密封装置进行了登记。我们每年都会提醒您何时进行防回流装置测试。

我们审核了安装样品,以确保它们符合澳大利亚标准AS/NZS 3500:1。如果您的安装不符合标准,我们将发出通知,要求您维修、维护、测试或更换设备。

如果您不遵守我们的回流要求或通知,我们可以:

  • 限制供水
  • 你断开
  • 向您收取我们为使您的连接满足我们的要求而产生的任何费用。

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