I am not a plumber by no means. Water company left a message that our meter was spinning and coupled with a bill that was 60 dollars higher it appeared they are correct. The meter is slowly slowly rotating. There is no water shut off in the house - only one is at the meter. Started turning off sink knobs- washer etc no change. When I closed the water feed valve into my water heater (new 2 years ago) the spinning stopped. I assume this means the leak is on the hot water side of the system pipes? Can a shower (both are single controls - not separate hot and cold) cause this? I crawled under the house and looking at the pipes see no leakage. IdeaS?