Do you have a higher than expected water bill and suspect a possible plumbing leak which may be contributing to it? You can test for a potential plumbing leak by shutting off all water on the premises and watching the flow indicator on the meter. Click the link for more information on how to read your water meter.
You could save about 500 gallons every year just by fixing a leaking faucet - check if you're unknowingly wasting water and $$. One of the easiest ways to do this is to find your water meter and take a reading during a period when no water is being used. After two hours, if the meter increases, you probably have a leak.