A triumph of our civilisation are the things that go on under the covers without us even noticing. When you pour stuff down the sink or flush it down the toilet, where does it go? Luckily, we don't need to think about it...until somebody does the wrong thing. That's when we should hail the invisible, unsung heroes of this story. That's right, these are the people that go down into the bowels - literally - of a city's plumbing to do what must be done. We can do our bit, it's not difficult... think before you flush. Here, Rod interviews Davina McCormick, General Manger Customer Engagement at ICON water. If you're in Floriade this weekend (21-22 Sep), be sure to see their display. Gritty, but highly recommended.