Final answer:
ABS pipes, known for their durability and resistance to corrosion and impact, are always black in colour. They are used primarily in drainage, waste, and vent systems and are distinct from PVC pipes, which can be white or grey.
Step-by-step explanation:
The ABS pipe, rated at 230psi (1590kPa), is black in colour. ABS, which stands for Acrylonitrile Butadiene Styrene, is a thermoplastic material that is resistant to corrosive chemicals and physical impacts, making it suitable for drainage, waste, and vent pipes especially in residential and commercial buildings. Unlike PVC pipes, which can be white or grey, ABS pipes are always black to differentiate them. This colouring also provides some resistance to ultraviolet (UV) light, which can be useful when the pipe is exposed to sunlight. Moreover, ABS does not require a primer when being glued together, in contrast to PVC, which further distinguishes it during installation processes.