On 12/10/16 7:06 AM, slate_leeper wrote:
I wrote a while back about an underground water leak. Well, I have
determined that the water leak is not in the feed line but is within
the structure. I was misled by a main shutoff valve that didn't
fully shut off.

So, back to the problem. I am using 120 gallons a day (5 gallons per
hour) in a house that is unoccupied. I have inspected everywhere.
There are no dripping faucets. All toilets have been shut off. There
is no visible moisture anywhere. This is a 70's "raised ranch" style
house with no crawl space. Once the water main enters from the
street, all piping is within the structure.

So where the heck is it leaking?

Could you use air to locate the leak? Shut the main off and
connect an air compressor as far upstream as possible. Set the
pressure regulator below the pressure rating of the pipes. The air
should eventually push the water out and maybe you'll be able to hear
the leak. Stethoscope?