10 Ways to Maximise Your Rainwater Harvesting System
Rainwater harvesting is a great way to cut down on water bills, reduce dependence on mains water and live more sustainably. Whether you use rainwater for watering plants, flushing toilets or even drinking with the right filtration, getting the most out of your system ensures you make it as effective as possible.
Here are ten practical ways to improve your rainwater harvesting system so you can collect, store and use water more efficiently throughout the year.
1. Choose the Right Tank Size
Before setting up a rainwater harvesting system, it is important to consider how much water you need. A small garden might only require a 200-litre water butt, while a larger property or farm could benefit from a 10,000-litre underground tank.
Some key things to think about include:
- The amount of rainfall your area typically receives
- How much water you use for different tasks
- How much space is available for storage
Getting the right size tank prevents water from overflowing in heavy rain and ensures you have enough during dry periods.
2. Consider Installing a First Flush Diverter
A first flush diverter helps improve water quality by discarding the initial rainwater that runs off your roof. This first portion often contains dirt, dust and bird droppings. By diverting it away from your storage tank, you reduce the risk of contamination and keep your water cleaner.
3. Use a Good Quality Filter System
Filtering rainwater is essential, especially if you plan to use it for drinking or household tasks. A good filtration system may include:
- Leaf guards to prevent debris from getting into the tank
- Sediment filters to remove dirt and other particles
- Carbon or UV filters if the water is for drinking
Regularly checking and cleaning filters will keep them working properly.
4. Position Your Downpipes Properly
Make sure gutters and downpipes effectively direct water into your storage tank. Keeping gutters clear of leaves and debris will improve efficiency. Installing gutter mesh or guards can help prevent blockages and reduce maintenance work.
5. Have an Overflow System in Place
During periods of heavy rain, tanks can quickly fill up. An overflow system ensures excess water is safely diverted. A well-placed overflow pipe leading to a soakaway, pond or secondary tank can help manage extra water and prevent flooding.
6. Keep Your Water Tank Clean
Over time, sediment, algae and bacteria can accumulate inside the tank. To maintain water quality, it is important to:
- Clean the tank at least once a year
- Use an opaque or dark-coloured tank to limit algae growth
- Regularly check for leaks, cracks and contamination
If you are using rainwater for drinking, adding a chlorine or UV treatment can help keep it safe.
7. Install a Pump for Better Water Pressure
If you plan to use rainwater for household appliances like washing machines, toilets or irrigation, installing a pump can improve water pressure. Choosing an energy-efficient pump suited to your specific needs will ensure reliable performance.
8. Make the Most of Your Rainwater
To get the best value from your system, use collected rainwater for as many tasks as possible. Some common uses include:
- Watering plants and lawns
- Washing cars, windows and patios
- Flushing toilets
- Running washing machines (with proper filtration)
- Drinking water (if treated correctly)
The more ways you use the collected water, the more savings you will see on your water bills.
9. Check Local Regulations and Incentives
The UK has regulations regarding water storage and rainwater use, particularly for drinking. Make sure your system complies with British Standards (BS 8515:2009) and check with your local council for any restrictions.
There may also be grants or incentives available for installing a rainwater harvesting system. Some councils and organisations offer funding to encourage sustainable water solutions, which could help lower installation costs.
10. Plan for Regular Maintenance
To keep your rainwater harvesting system working effectively, it is important to:
- Inspect filters, pipes and pumps regularly
- Clean gutters at least twice a year
- Test water quality if using it for drinking
- Arrange for an annual system check-up
Keeping up with maintenance will improve efficiency, prevent blockages and extend the life of your tank and filtration system.
A well-maintained rainwater harvesting system can help you save money, reduce your environmental impact and provide a reliable alternative water source. By following these ten tips, you can make the most of every drop and keep your system running efficiently for years to come.
If you are looking to upgrade your water storage, take a look at our range of high-quality water tanks designed for rainwater collection.
