Why black ABS pipe?

[Chuck]

Just curious...why do they use abs for all the drain lines? it appears that they use it in new trailers, as well, from what I can see looking at the dump valves and exterior lines on new units. is it lighter? cheaper? some other reason? any reason that one shouldn't use pvc, as is dictated by most dwelling building codes?

[john hd]

i know it is much lighter than schedule 40 pvc pipe.

hows that for one reason?

john

[balrgn]

ABS pipe is: rigid, non-pressurized plastic pipe used to drain your sinks, tubs, showers, toilet and washing machines. It is also used to vent the drain and waste pipes.