backflowpreventer中文

WattsBackflowpreventer

In the spirit of reconciliation, Water Corporation acknowledges the Traditional Custodians of Country throughout WA and their enduring connections to land, sea and community. We pay our respects to Elders past and present, and extend that respect to all Aboriginal and Torres Strait Islander peoples today.

All boundary containment backflow prevention devices installed at the property boundary have to be registered. This information must be provided to us by a backflow accredited licensed plumbing contractor.

The installation of a containment backflow prevention device does not eliminate the need for zone and individual backflow prevention devices that may be required under plumbing standards. We do not manage zone or individual backflow protection.

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Reduced pressure zone devices have two independently acting non‐return valves. Flow through the device will only occur when there is sufficient pressure to overcome the valve springs. A relief valve is located between the non‐return valves and opens to atmosphere under conditions of backflow.

Some forms of backflow prevention will reduce water pressure and flow rate downstream of the device. If water pressure and flow rate is critical for the activities on your property, you need to consult with a licensed plumbing contractor or hydraulics consultant before choosing and installing a backflow prevention device.

Backwater valve

Double check valves have 2 independently operated spring loaded, non‐return valves in series. Flow through the device will only occur when there is sufficient pressure to overcome the valve springs.

Fire services need to be fitted with medium rated backflow prevention. This can be either a registered break tank/air gap or a double check valve with the ability to incorporate a detector assembly if required.

A registered break tank means the device is recorded in a backflow prevention management system and is suitable for use in high risk situations. Registered break tanks must be tested at commissioning, after any maintenance and every 12 months by an an accredited backflow tester, qualified to test the devices.

A break tank is an approved air gap that disconnects the incoming water supply from the downstream water system. It has an air gap on the water inlet to the tank and an overflow that is below the level of the air gap.