A normal non-dual toilet handle wastes up to 30 litres of water per person in your household everyday. It's also important to bear in mind that you pay for your water twice - when it enters you property and when it leaves as well.

This device stops the lavatory from flushing when you let the handle go. This alone saves up to nine litres, and if you're metered for your use you can save you up to £100 per year that would normally go down the drain.