www.pmmag.com/articles/88912-general-pipe-leak-detection
General Pipe Leak Detection
February 1, 2004

The new Gen-Earâ„¢ from General Pipe Cleaners blends the latest in filter, headphone and sensor technology for an advanced acoustical leak detection system. Locates leaks in PVC, cast-iron, copper and steel lines. Its Digital Spectrum Analyzer with 16 audio filter combinations removes ambient noise.
Circle 48