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FREE SHIPPING ON ORDERS OVER $100 AUSTRALIA-WIDE* (T&C's Apply - exc Bulky Items)
FREE SHIPPING ON ORDERS OVER $100 AUSTRALIA-WIDE* (T&C's Apply - exc Bulky Items)

Backflow Prevention

Backflow is a reversal of the normal direction of water flow in a water supply plumbing system.

It occurs when the water delivery main is at a lower pressure than the internal plumbing system (back siphonage). Back siphonage can occur when there is a burst or ruptured water main, or due to excessive demand during fire-fighting operations or other periods of high demand.

Backflow can also occur if a water pump, such as a bore pump, is cross connected to the internal water plumbing system, and is pumping bore water at a higher pressure than the water mains pressure (back pressure).

If a property’s drinking water supply is inadvertently connected with a source of pollution, either through a cross connection or simply a hose submerged in a container of liquid, then these pollutants could enter the water supply when there is an overpressure on the private property side or a sudden drop in water mains pressure.

  • Brass Dual Check Valve/ Backflow Preventer Size: 20mm Brass Dual Check Valve/Backflow Preventer, 25mm Brass Dual Check Valve/Backflow Preventer
    Original price $61.79 - Original price $72.19
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    Brass Dual Check Valve/Backflow Prevention for Mains Irrigation Systems

    Brass Dual Check Valve/Backflow Prevention for Mains Irrigation Systems FF Use the Dual Check Valve for backflow prevention from your irrigation sy...

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  • Original price $66.14 - Original price $66.14
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    $66.14
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    Current price $66.14

    AVG 20mm Brass Press Fit Double Check Valve/Backflow Preventor with Isolation for Mains Irrigation Systems

    AVG 20mm Brass Press Fit Double Check Valve with Isolation Valve for Mains Water (Dual Check Valve Backflow Prevention)  DOWNLOAD PRODUCT BRO...

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  • Conbraco Brass RPZ Devices Size: 20mm Brass RPZ Devices, 25mm Brass RPZ Devices, 32mm Brass RPZ Devices, 40mm Brass RPZ Devices, 50mm Brass RPZ Devices
    Original price $1,031.80 - Original price $1,900.80
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    Conbraco Apollo Series 4A-200 Brass Backflow Prevention RPZ Devices

    Conbraco Apollo Series 4A-200 Brass Backflow Prevention RPZ Devices  Download Product Brochure The Apollo Series 4A-200 Reduced Pressure Pr...

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  • Hose Bib Vacuum Breakers Size: 20mm Hose Bib Vacuum Breaker, 25mm Hose Bib Vacuum Breaker
    Original price $32.82 - Original price $41.33
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    Hose Bib Vacuum Breakers

    Hose Bib Vacuum Breakers Attached to sill cocks, valves, and hydrants with Male hose thread outlet. For indoor or outdoor use. Designed to prevent ...

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  • Original price $488.58 - Original price $1,630.98
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    Watts Series 009-SS Stainless Steel Backflow Prevention RPZ Devices with Strainer, Unions & Lockable Ball Valves

    Watts Series 009-SS Stainless Steel Backflow Prevention RPZ Devices with Strainer, Unions & Lockable Ball Valves  DOWNLOAD INSTALLATION DOW...

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  • Original price $338.94 - Original price $1,007.64
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    Watts Series 009 Brass Backflow Prevention RPZ Devices with Strainer, Unions & Lockable Ball Valves

    Watts Series 009 Brass Backflow Prevention RPZ Devices with Strainer, Unions & Lockable Ball Valves   DOWNLOAD INSTALLATION DOWNLOAD BROCHU...

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  • Original price $284.63 - Original price $796.95
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    Watts Series 007 Brass Double Check Valves Backflow Preventor Assemblies with Strainer, Unions & Lockable Ball Valves

    Watts Series 007 Brass Double Check Valves Backflow Preventor Assemblies with Strainer, Unions & Lockable Ball Valves  DOWNLOAD BROCHURE DOW...

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  • Conbraco Brass Double Check Devices Size: 20mm  Brass Double Check Devices, 25mm  Brass Double Check Devices, 40mm  Brass Double Check Devices, 50mm  Brass Double Check Devices
    Original price $635.25 - Original price $1,314.23
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    Conbraco Apollo Series 4A-100 Brass Double Check Valves Devices

    Conbraco Apollo Series 4A-100 Brass Double Check Valves Devices  Download Product Brochure The Apollo Series 4A-100 Double Check Valves are ...

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