It can work, because what you are trying to do is not to move a
lot
of air and sand, but try to make some noise. And you don't have to
move a whole lot of sand to do that. As long as the pipes stay
together, some air will make it out of the open end and make some
noise.


Yes, making noise was key in locating my underground PVC. In my case,
I was able to locate the end by listening closely NEAR where I thought it
should have been while someone else was running a snake fully inserted in
the pvc back and forth a few inches.... the noise it made at the last
sweep was evident with no other background noise to interfere with it.

Ed K7AAT