On Sun, 26 Aug 2007 12:24:42 -0400, Nate Nagel
wrote:
snip

So here's the question; is there any way to determine where exactly a
PVC drain pipe runs if you can't snake it without digging? Digging this
up would likely involve draining the cistern, moving it, and removing a
large concrete pad.

thanks,

nate

If you can get a stiff wire or a smaller metal snake (like an
electrician's snake (steel, not fiberglass)) down the pipe, you can
rent a cable/pipe locator.

You clip a connection from the locator onto the snake and that drives
it with a signal. Then the locator head senses that signal to locate
the path of the wire. The better units will even estimate how deep
the line is.

A well stocked rental yard will have one of these. They're usually
called magnetic cable locators. It takes some fussing around, but
they work.

HTH,

Paul F.