I need some advice. My house was built in 1998 and I live in Texas. I just noticed the other day ( about 2-3 days ago) my bath tub had a running water sound. Well I have gone to my meter 3 times now and its not moving at all (like it would if it was a leak). Today I finally turned everything off from the meter and went to my tub and noticed the sound was gone. So I turned the main water line on and the sound came back. So then I turned off every faucet,toilet, and any other water line I could find in the house. When I turned off my faucets in the same bathroom as tub I noticed the sound in the pipes to the faucet. This is the only room with this sound. So I couldn't figure out what to turn off since when all were of individually the sound kept going. I went and double checked the meter and its not spinning at all or even budging. What gets me is if I turn off the water from the meter the sound goes away. Anyone have any ideas? Also my water temp has not changed nor has the pressure.