Not only an environmentally sound idea – it also saves money!  Water meters are becoming mandatory and like all utility bills are likely to increase. Using rainwater will save your metered mains and therefore your pocket.
An underground storage tank for rainwater is less obtrusive in your garden, can be linked up to a tap or retractable hose pipe. It can be filtered for cleaner water and because it is stored underground, the growth of algae is eliminated.

Your plants will love it too!

As much as 64,000 litres of water can be collected from the average house roof  – equivalent of 213 water butts!