Re Drought giving dowers a wave of work" (Capitol & California): I use two pieces of thin welding rod held by a small bend, about four inches, slightly tilted down in front of you. As you walk, slowly, the rods will align with any steel pipe or water filled pipe below the ground. You must cross the hidden pipe at nearly right angles. So make several passes in different directions.
Why does this occur? The earth has a magnetic field. We know that steel or iron will be attracted to magnetic fields. Therefore, it should be a given that steel pipes would easily be found. Plastic does not attract magnetism. But water also seems to concentrate magnetic lines of force from the earth. Thus, they can be found. You can do it.
-- Dale Creasey, Fair Oaks