Rhode Island Journeyman Plumber Practice Exam

What is the height of an ideal vent for a stack when measured in feet?

1. 40.59'

2. 45.59'

3. 43.57'

4. 30.57'

The correct answer is: 43.57'

The height of an ideal vent for a stack, when measured in feet, is based on standards set to ensure proper ventilation and to prevent back pressure in the plumbing system. The correct answer aligns with the proper ventilation practices that are crucial in plumbing design to ensure that any gases or odors are effectively expelled from the system. Specifically, a stack vent needs to extend a certain height above the roofline to avoid any potential obstruction from neighboring structures or to ensure that it rises above the line of sight for human activities. The specified height also minimizes the risk of fumes entering a building or affecting air quality. Thus, the measurement provided corresponds with industry standards for effective plumbing stack venting. This ensures that the vent performs optimally, promoting good airflow and maintaining a safe and sanitary plumbing environment. The other options represent values that either exceed or fall short of this optimal height, which would not comply with the norms for effective stack venting.