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 6320-01-454-1965
NSN 5960-01-094-7569
NSN 2925-00-549-6759
NSN 5930-01-198-3216
NSN 5935-01-498-3544
NSN 5950-00-193-5185
NSN 5998-00-941-8075
NSN 6320-00-845-3261
NSN 6685-01-174-9574
NSN 7035-01-080-3392
NSN 5925-01-295-5495
NSN 5965-01-286-6548