Thomas Edison. Thomas Alva Edison (February 11, 1847 â October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb.
Pipe dope, or pipe joint compound, is a gooey compound used to seal the connection between threaded pipes and fittings. Because the threads in pipes and fittings still leave an air gap between the two surfaces, the gap must be filled to make it water tight (or gas tight for gas lines).
Driscoplex ï£¨ 6500 MDPE Gas Distribution PipeThese medium density polyethylene (MDPE) PE2708 (PE2406) pipeand fittings are s used primarily in pressurerated gas distribution systems. The-product is also suitable for LPG, propane, yard gas and most after-meter applications. The product is a solid yellow medium density pipe that meets ASTM D3350 Cell Classification of PE234373E and APWA/ULCC Color Code Standards.