Abstract: An apparatus that allows for the testing of pipes, either underground or in other inaccessible locations, for leaks and determines the exact locations and severity of said leaks. By the use of a ball, attached to a retaining string, traveling through a piping system on the flow of liquid that is exiting through the pipe leak, a user is capable of determining the location of the leak within inches, even on long line piping systems. The invention utilizes a reservoir of liquid that is forced through the pipe under test using a pump. A calibrated reel of retaining string then provides the exact location of the leak.