Modification: self-cleaning tap-timer
A battery-powered tap-timer replacing the finger filter. Programming this on for a minute a day drains 9 litres of water into a watering can, automating the cleaning system. The tap-timer can be opened manually to drain the diverter completely, or extract more water as required. In the background, the original storm water connections can be seen - this is still used occasionally for cleaning or to divert water in heavy rainfall.