If you have another use for this water that normally goes down the drain – such as growing your own fruit and vegetables – you will soon reap (pun intended) the benefits of such water saving products.

Some water suppliers have a scale where you pay higher prices for water once you go over 440, and then 880 litres in a household (I think they are the figures).

Water doubling in price before 2012 has been widely written about so payback is unlikely to be that long at all for most users.

Can’t say this about most things but water is too damn cheap. Should be some sort of sliding scale. Less water reserves, higher the prices and vice versa.