On Jun 16, 3:56 pm, "Toller" wrote:

Would they find cement or clay pipe?

The National Ground Water Association dismisses the idea of water
dowsing as "totally without scientific merit" and recommends instead
"the use of proven hydrogeological and geophysical techniques for
groundwater reconnaissance when its presence is not easily
recognizable by drilling contractors"

http://www.ngwa.org/ngwainwashington/isswitch.cfm