Dowsing

The watery theme continues, just as the weather forecast dictates. But with a twist or perhaps a twitch.
Somewhere amongst all these great works there is a water leak. This is an un-ignorable situation; the cost both monetary (the meter is whizzing round far too fast) and environmental is unacceptable to wallet and principles but where do you start? Even those most familiar with the farm in the last twenty years are baffled by aspects of the water supply and the number and placement of drains, taps and troughs are confusing and sometimes deliberately unhelpful. There are multiple possibilities and hours are spent eliminating options until it's possible to arrive fairly safely at a logical conclusion. It's clear which length of pipe must be leaking, but where exactly does the pipe meander on its route from A to B?
A neighbour renowned for his dowsing skills is called. His rods twitch definitively. Red paint is sprayed along the ground. A pit is dug, and there is the pipe. Sadly, dowsing can't tell us where the leak is, and now Scoopy will be called upon to dig yet another lengthy trench to by-pass and remedy the leak with new bright blue pipe that coils and springs like an overactive serpent.