We moved into our new rebuild in July 2009, it includes a 4200 litre Bluescope rainwater tank with submerged pump. The pump and wall-mounted controller are manufactured by Davey.
Recently we noticed that the pump was starting up at random intervals when no water was required (3 cisterns + washing machine connected). After worrying about leaks inside walls (nightmare!) I eventually decided that the controller was faulty - it would try to start and stop the pump even if the pump wasn't plugged in. I called Bluescope who referred me to Davey, and about a week later a man from Davey arrived and took about 20 minutes to replace the controller with a new one.
Here's the good news - he didn't charge me!
Although the equipment has a 2-year warranty and it was about 3 months outside it, he told me Davey warranties are now 3 years, and my gear was backdated to be included. Nice one Davey.