Understand your rainwater needs
Store your rainwater
Assess your rainwater collection area
Clean: Filter leaves and debris
Clean: Divert the first flush of rainwater
Secure your rainwater system
Decide on a pump or gravity-fed system
Manage standing water
Final stage rainwater filtration
Optimise your overflow
Monitor your water level
Care for your system
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.
Optimise your overflow
Make sure your overflow is plumbed into a stormwater main with an Air Gap, and that your outlet can handle as much water as your inlet during heavy rain.
THINGS TO CONSIDER
Where does your overflow go?
Your overflow should be plumbed into a stormwater main with an Air Gap, so excess water drains away safely and nothing flows back into your tank.
Match your outlet to your inlet
In heavy rain, water needs to leave your tank as fast as it arrives. Your overflow outlet should be at least equal to your inlet to stop water backing up.
Protect it and gain storage
A mosquito-proof screen keeps pests out of your overflow, and a high-level overflow can lift your usable water level for extra storage.
The Handbook
Your complete guide to collecting rainwater, from first steps to system maintenance.
Free design service
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