I own a property that has a cast iron sewer line that runs under the basement floor, and I want to be able to mark out and locate where it runs under the basement floor. I know that I could hire a company to come out and do that, but I am wondering if there are any fairly cheap, creative, and interesting/fun ways for me to try to locate the line myself.
For example, is there some kind of small signal generator that I could attach to a sewer line snake and detect the signal from above with some type of detector? -- maybe something that Radio Shack or some electronics store might sell?
Or, are there relatively inexpensive underground pipe-locating devices that I could rent somewhere and do the job?
Would a metal detector be able to detect a cast iron pipe under a concrete floor (assuming that the pipe is not down very far below the floor?