Spot the leak

All pipe connections – between pipes, to a tap, to drainage, etc. – are potential sources of leakage. Any soggy areas of ground or unexplained rises in your water bill may indicate broken or cracked pipes.

Be attentive and trace leaks. A little seepage of water can cause major problems further down the track, especially when it comes to fine cracks, as they’re difficult to see at first.

Locate the origin of the leak, turn off the water at the mains and call a licensed plumber to fix the problem.

Dripping taps and a running cistern may simply need a new washer.
 

From: 10,001 Timesaving Ideas