What is an acceptable material for venting in residential plumbing?

An acceptable material for venting in residential plumbing is ABS plastic. This material is favored because it is lightweight, easy to install, and resistant to many chemicals commonly found in waste systems. ABS (Acrylonitrile Butadiene Styrene) has suitable strength and durability properties to withstand the atmospheric and wastewater conditions typically encountered in venting systems. It is also non-corrosive, which enhances its lifespan in comparison to materials that can degrade over time.

In contrast, other materials mentioned are not suitable for venting purposes. For instance, lead is not used due to its toxicity and health risks associated with lead exposure. Galvanized steel, while durable, can corrode and is not typically recommended for venting in modern plumbing systems because the risk of rust formation can obstruct airflow over time. Vinyl lacks the structural integrity and chemical resistance required for vent systems and is not permitted for this application in plumbing codes. Thus, ABS plastic stands out as the appropriate choice for venting installations in residential plumbing.