Be careful when recovering rainwater, you risk a fine of 1500 euros if your tank is not

tdoor use.

2. Separate From the Drinking Water System

• Never connect your rainwater tank to the potable water supply.
• Install anti-backflow valves and clear separation to prevent contamination.

3. Filter the Water

• Install a filter at the collection point to catch leaves and dirt.
• Use additional filtration (e.g., sand or charcoal) if using rainwater indoors.

4. Declare Your Installation (If Required)

• In some regions, especially in France, rainwater tanks must be declared to the local town hall or water agency.
• This is especially important if the system is connected to indoor plumbing.

5. Regular Maintenance

• Clean gutters and filters regularly.
• Check tanks for leaks, algae, or sediment buildup.

🧾 Did You Know?

• Some municipalities offer subsidies or tax credits for installing rainwater systems — but only if they meet legal standards.
• In certain countries, using rainwater indoors is strictly prohibited unless specific hygiene conditions are met.

✅ The Bottom Line

Collecting rainwater is a great idea — but only if done responsibly. With the right setup and by following local regulations, you can enjoy the benefits of free, sustainable water without running the risk of a €1,500 fine (or worse).

So before you install that tank, do your homework. Check with your local municipality or building authority to understand your obligations. A little precaution now could save you a lot of trouble later.

Would you like a checklist of rainwater system requirements based on your country or region?