Tank Overflows
Tank overflows let water leave your tank cleanly during heavy rain while keeping mosquitoes and pests out, with mosquito-proof screens fitted to the overflow outlet. The range covers overflow kits, high-volume options that can increase your tank's usable storage, and screens sized to suit your tank.
Flap Valve Non-Vented
Mozzie Stoppas w/ Removable Screen
Vent Cowls Weatherproof
Air Gap
Air Gap
Flap Valves w/ Vented Screens
Mozzie Stoppas Hinged Screen
Flap Valves w/ Vented Screens
Vent Cowls
Flanged Tank Overflow Kits
Kit - 100mm Curved Wall Overflow + Gasket + Screws
Vent Cowls Weatherproof
Optimise your overflow
Every system overflows eventually. A well-designed overflow protects your property from water damage, keeps pests out, and can even add to your usable storage when it is set up well.
The 12 Steps of Rain Harvesting™
Frequently asked questions
What's the difference between a standard overflow and a high-volume overflow?
How do I know whether I need a flat wall or corrugated tank overflow?
What size overflow do I need?
Do I need to worry about insects or pests getting in through the overflow?
Where should the overflow be positioned on my tank?
Designed by Rain Harvesting™
Need a tailored system design?
Our specialists can design a complete Rain Harvesting™ system for your property or improve an existing one. You’ll receive a detailed report with everything you need to install and maintain it.
The Handbook
The ultimate guide for help and inspiration to start your rainwater harvesting journey today.