A device designed to be connected to a drainage system to prevent sewer gas from backing up beyond a desired point by forming a water seal in the line. This is accomplished by its peculiar shape, which is usually in the form of the letter p and s. It is provided with an internal shoulder(s) at the end(s) of its internal threaded or unthreaded portion, whose inside diameter conforms to standard weight wrought iron pipe or copper drainage, waste and vent (dwv) tube. When connected, the mating pipes make up close to the shoulders to eliminate pockets and provide a smooth flow of pipe and/or pipe fitting contents. Excludes trap, drain, plumbing fixture; and trap, soil pipe.
Classification: Tubes,pipes, hoses, and fittings thereof of plastics, nesoi
NSN 5996-01-400-3558
NSN 6150-01-615-4093
NSN 2925-00-120-9302
NSN 5945-01-106-3893
NSN 6685-00-982-2843
NSN 5905-00-266-8401
NSN 5920-01-200-3867
NSN 5935-01-429-1262
NSN 6130-01-010-3254
NSN 5855-00-058-1293
NSN 5965-01-364-0829
NSN 5895-01-174-0850