A. No, the black and white tubular drainage parts are mostly made of polypropylene plastic, colored black to match ABS piping or colored white to match PVC piping. There are some parts made of ABS and PVC so those specific parts can be glued (solvent welded) to the stub outs of the type pipe, ABS or PVC being used in the house drain. Color choice is usually based on customer preference to match the type of piping in their house drain systems.