Water sound behind wall?

Question

Ok in my house today i noticed for the first time ever there is a sound of water running behind the wall upstairs of my house , there were no appliances or anything running so i think this is verry bad

I have shut off all the water to my house from the main line and i still am hearing it, the house is on a concrete slab there is no crawlspace or basement but yet downstairs im not seeing any visible sign of water from upstairs ,

PS. the room the noise is coming from is not near any water lines i could imagine , it's a bedroom about 20 feet from the nearest bathroom and there are no water connections in that room

Any help please!!!?

Answer 1

Check your water heater.You stated that the noise is upstairs.If the water heater is in the attic it could have a leak or the pop off valve could be open.You would not see water because they put a pan under the heater that runs to a drain..Just a thought.

Answer 2

that is just probably the sound of water running through pipes to get throughout your house as long as there is no sign of moisture ur ok

Answer 3

If there was water leaking, you should have seen it without a crawl space, check the floors around the wall. If it just sounds like water flowing, its probably just a drain line, if its a spraying sound, you got a leak. Call a plumber if you are really paranoid, water damage cleanup is very expensive.