Massachusetts Plumbers Journeyman Practice Exam

Which materials are acceptable for urinal waste branches and urinal fixture wastes?

1. Plastic only

2. Galvanized steel only

3. Extra heavy or service weight cast iron, threaded cast iron, iron size copper or brass

4. Aluminum only

The correct answer is: Extra heavy or service weight cast iron, threaded cast iron, iron size copper or brass

The correct choice indicates that extra heavy or service weight cast iron, threaded cast iron, iron size copper, or brass are acceptable materials for urinal waste branches and urinal fixture wastes. This is because these materials are durable, resistant to corrosion, and capable of handling the stresses associated with wastewater systems. Cast iron, particularly in the extra heavy or service weight categories, is known for its strength and ability to accommodate the flow of waste efficiently while minimizing the risk of leaks or breaks. In addition, threaded cast iron provides reliable connections, which is crucial in plumbing systems to prevent leaks. Copper is also commonly used in plumbing due to its antimicrobial properties and resistance to corrosion, making it suitable for a variety of applications, including holding and transporting waste. Brass is similarly robust and is frequently used for plumbing fixtures. On the other hand, plastic, galvanized steel, and aluminum do not meet the same mechanical properties and corrosion resistance standards for urinal wastes when combined with the rigorous demands of plumbing applications. Plastic, while suitable for some plumbing tasks, is generally not recommended for waste branches due to concerns regarding its strength and potential for damage over time. Galvanized steel can corrode and may not last as long under certain conditions, while aluminum, despite its lightweight and