Not quite Sydney but with regard to leaky pipes. We live in Karratha WA so
have to water year round. Recently we were changed from the Millstream
(high calcium deposit) water supply to the Harding Dam which has a brand
new, state of the art filtration system. Yippee no more white calcium
marks everywhere.

Get to the point :-)

All of our reticulation (solenoids - I believe they are called) started
leaking badly, not to mention the main (poly) pipe joins running into the
house!!! Something to do with the deposits washing out I think. Anyway,
fortunately we noticed one leak and then a second and decided to get digging
and do a full inspection. Our water bill will be astronomical now but
imagine if we hadn't noticed!!! So do check for leaks - we thought there
couldn't be anything wrong with our 18 month old system.

Rambled a bit sorry -
Sue - Karratha WA.