The latest national standards emphasise that the highest priority for managing runoff should be the collection of rainwater for non-potable uses.
This aligns with the principle that drinking water should not be used for purposes such as toilet flushing.
The key approach
The key approach is to divert fast-flowing rainwater from roofs into underground storage tanks. This not only prevents overloading drainage infrastructure during heavy rainfall but also supports the principle of managing the first 5mm of rainfall at source, reducing surface water runoff.
Our domestic systems fulfil the requirements of the updated standards.