Frazzled.......we've got one of the Hunter controllers which puts out a 24V signal.......perfect for a mechanical solenoid. The 24V solenoid cost about $20 from an irrigation shop and works on low pressure tank water too.....for a cheap kit timer if you are handy with a soldering iron google australian pages for 'flexitimer'
Bloss' link to Holman Industries will also line you up to their version of the Hunter AC powered controllers. But get in fast because Nylex (who own Holman) have fallen foul of the financial conditions....and who knows what the fallout might be.
People don't ever seem to realise that doing what's right is no guarantee against misfortune