Tunnelling under sidewalk/walkway
Although this is not an irrigation-related question, per se, I thought maybe some of you experts could offer some suggestions.
I am installing some low-voltage landscape lighting and need to route some of my wiring under a concrete sidewalk that wraps around the side of my house to the back of my house. I've read that the best way to accomplish this is to dig a trench on either side of the sidewalk, and using a pipe and a water hose, push the pipe through using the water to dig through the earth under the sidewalk. What I've seen suggested is to use a metal pipe that's threaded on one end with a hose adapter. Unfortunately I've had no luck in locating a source for the metal pipe and, in fact, various contractor/plumbing suppliers have looked at me like I was crazy when I explained what I was trying to do. I'm inclined to believe this is a fairly common problem that irrigation system installers deal with everyday. Can anyone out there suggest how I can either do this a different way or suggest where I can purchase the materials I need?
Thanks in advance for your help.