Sample interview questions: Are you knowledgeable about different types of plumbing vents and their functions?
Sample answer:
Types of Plumbing Vents and Their Functions:
- Stack Vent: A vertical vent that extends from the gravity drainage system through the roof. It allows air to enter the drainage system, preventing siphoning and maintaining trap seals.
- Branch Vent: A vent that connects to a horizontal drain line and extends through the roof. It prevents the formation of pressure or vacuum in the line, ensuring proper flow.
- Individual Vent: A vent that connects directly to a fixture drain. It prevents siphoning and ensures proper drainage.
- Loop Vent: A vent that forms a loop around two or more fixtures, preventing siphoning and maintaining trap seals.
- Circuit Vent: A vent that connects to a horizontal branch line and extends through the roof. It vents multiple fixtures in a group.
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