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100mm  Stormwater Backflow Prevention Device – Air Gap

100mm Stormwater Backflow Prevention Device – Air Gap

Regular price $71.75
Sale price $71.75 Regular price
100mm  Stormwater Backflow Prevention Device – Air Gap
Part Number: TAAG02 | Size: 100mm

Protect your rainwater from contamination by preventing stormwater backflow – and mosquitoes – from entering your tank through your outlet pipes. The 100mm Air Gap Backflow Prevention Device by Rain Harvesting (Blue Mountain Co) creates a physical gap between your rainwater tank and stormwater lines, ensuring dirty stormwater cannot back up into your valuable rainwater storage.

Includes two removable insect-proof screens for easy cleaning and a raised lower lip on the air gap opening to minimise splashing.

Specifications
Brand Blue Mountain Co
Model Stormwater Backflow Prevention Device (Air Gap)
Material Durable UV-stabilised plastic (paintable)
Compatibility Rainwater bladder tanks, above/below ground tanks
Size 100mm
Application Prevents stormwater backflow from contaminating rainwater tanks
Compatibility 100mm overflow pipes on rainwater tanks
What's in the Box: Air Gap unit with two removable mosquito-proof screens
How It Works – Air Gap
1

Stormwater system blocked downstream – A blockage occurs in the stormwater drain system.

2

Backflow attempts to enter – Stormwater tries to flow back into your rainwater tank.

3

Air gap activates – The device creates an air gap that prevents backflow from entering your tank.

4

Safe discharge to ground – Contaminated water flows out of the air gap and discharges safely onto the ground.

5

Pest protection – Mosquito screens block insects and vermin from entering your tank via the overflow.

When Is This Required?
⚠️
Stormwater system blocked downstream

Risk: Stormwater flows back into your rainwater tank. Solution: Air gap prevents contamination.

⚠️
Unknown water quality in stormwater drain

Risk: Potential chemical or bacterial contamination. Solution: Diverts backflow safely to ground.

⚠️
Mosquito breeding in overflow line

Risk: Pests entering tank system. Solution: Removable mosquito-proof screens.

⚠️
Property in low-lying area

Risk: Higher risk of stormwater surge backflow. Solution: Air gap provides protection.

💡 Tip: Local plumbing regulations may require backflow prevention on all stormwater connections to rainwater tanks. Check with your local council or plumber.

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