Q."What does tubular mean?" A.It is a thinner walled pipe most commonly used under sinks to attach sink drains to the house drain. It allows the use of slip joint adjustable connections by being light weight yet durable, also it's easier to install compared to direct hard line connections.
Q."What is ABS pipe?" A.ABS stands for Acrylonitrile-Butadiene-Styrene. ABS pipe is a black plastic pipe used for water distribution, drain, waste, vent and sewage.