On Sat, 10 Dec 2016 14:02:53 -0500, "catalpa"
wrote:


"slate_leeper" wrote in message
.. .
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?


Get someone with good ears, they should be able to hear the water running in
one of the pipes. Then follow that pipe to the leak.

Where is the meter? Where is the shutoff in relation to the meter?
What kind of soil is under the house? Do ANY of the water pipes after
the meter and/or shutoff run either within the slab or underground?
Can you get your hands on an ultrasonic flow detector? Should be a
plumber in your area that has one, you would think.

As a last resort, shut off the water , drain the pipes, cut the pipes
and install 1/4 turn gate valves in strategic positions to be able to
isolate certain "zones" and see which sector the leak is in.