I recently received a notification from my water department that they suspect I have a leak somewhere in my house. Apparently, the meter outside has a mechanism that goes off if water has been running for 24-continuous hours.
As a test, I tried turning off all water in the house and checking the meter. Then, approximately 20-30 minutes later, I checked the meter again and compared numbers. Sure enough, I had gone through 1/3 of a gallon.
Now comes the fun part -- finding the leak. I've checked:
- Water supply valves and spouts.
- Toilets (placing dye tablets in toilet tanks)
- Major appliances (refrigerator, dish washer, clothes washer, etc)
The only thing I found was a extremely small leak in the toilet water supply valve. I'm in the process of replacing the valve but I'm skeptical this is it.
When I periodically check my water meter, it looks like I'm leaking approximately 1 gallon an hour.
One thing seems odd: when I stand close to the water main line as it enters the house, I hear a faint hissing sound.
So my question is this: Is a faint "hissing" sound from a water inlet pipe a good indication that water is in use? Can I trace that sound to the source? Or is this a red herring and could be caused by something else?