Massachusetts Plumbers Journeyman Practice Exam

According to the Massachusetts Plumbers Code, where should the fixture wastes be connected when installing two lavatories on a two inch horizontal waste branch?

1. The top of the branch

2. At the end of the branch

3. Into the center of the branch

4. Into the side center of the branch

The correct answer is: Into the side center of the branch

The correct approach for connecting the fixture wastes when installing two lavatories on a two-inch horizontal waste branch is to connect them into the side center of the branch. This method ensures that the waste from both fixtures is appropriately directed into the waste line, allowing for effective drainage while minimizing the risk of clogs or backflow. By connecting into the side center of the branch, you also allow for better alignment with the flow of waste and ventilation, which is crucial for maintaining proper drainage. This positioning aids in ensuring that both lavatories can operate concurrently without causing a negative impact on the drainage system's overall performance. Additionally, this configuration adheres to the principles outlined in the Massachusetts Plumbers Code, which emphasizes effective waste management and plumbing system efficiency.