Rainwater projects can affect drinking-water safety, drainage, structures, excavation, electrical systems and neighbouring property.
No professional advice
The site does not provide engineering, plumbing, medical, environmental, legal, financial or contracting services. Examples and formulas are simplified for early planning.
Water safety
Rainwater is not necessarily safe to drink. Potable or high-exposure use requires local public-health guidance, validated treatment, testing and regulatory compliance.
Codes and standards
Rules vary by country, state, province, territory and municipality and may change. Model codes and standards may not be adopted locally.
Costs and savings
Prices, water tariffs, incentives, maintenance and payback vary. Calculator results depend entirely on entered assumptions and exclude many lifecycle factors.
External links
Links are provided for convenience and do not guarantee that external content remains accurate, available or applicable.