On Jan 26, 11:17 am, "JoeSpareBedroom" wrote:
"dpb" wrote in ooglegroups.com...
....
...the underground wire tracer is the next best bet.
....
Do you need a building permit to install underground sprinklers? If so, I
wonder if the location of all items might be listed, particularly since
there would be concern about installing near gas & water lines.

Nowhere I'm aware of, certainly. The depth of a lawn sprinkler system
barely scratches the ground, nothing close to the depth of any utilites
so the interaction there is of minimal concern at most.