[ale] [OT] I need a tone generator for subterranean wire tracing

[Doug Hall]

It could be a bad solenoid at the valve. Replacement solenoids are
generally available at Home Depot or Lowes. Here's an example
<http://amzn.to/kOGhiP>. I recently got one for about $8 at Home
Depot. Either way, you've got to find that valve where the zone
begins. You might be able to guess the approximate location of your
valve, based on the location of the water meter at the street and the
location of the zone ion question. If zones are close together, it's
likely that the installer purchased a pre-assembled valve set like
this one <http://amzn.to/mbZw0J>. These are typically protected by
something like this: <http://amzn.to/kyvuWn>. That's what you're
looking for. These should be exposed to the surface, but they're easy
to cover and forget about. Often simple erosion does that. If so, look
for an unnatural dip in the surface of the ground where you might
expect it to be.

Good luck!