What is an approved type of pipe for use on a house drain?

Brass is a metal that is commonly used in plumbing fixtures and fittings due to its corrosion resistance and durability. However, it is not the ideal choice for house drains when it comes to the pipe itself. The approved types of pipe for house drains are typically those that are more flexible, resistant to corrosion, and capable of handling the waste materials and moisture in drainage systems.

For house drainage systems, polyvinyl chloride (PVC) is widely accepted because it is lightweight, easy to install, and resistant to rust and corrosion. PVC is specifically designed for drainage applications and is known for its smooth interior, which minimizes clogs. Other options, such as galvanized iron, while once common, can eventually corrode and result in leaks over time. Asbestos cement, while it was used historically for its strength and durability, is no longer considered safe or approved due to health risks associated with asbestos exposure.

Therefore, while brass fittings may be suitable in certain applications, including connections and valves, it is not the most appropriate material for the entirety of a house drain system. PVC is the preferred choice for these applications.