Plumber Red Seal · Question
When installing an island fixture vent (loop vent) for a kitchen sink, where must the top of the vent loop be located?
The top of the loop vent must extend above the flood level rim of the fixture it serves. This is a critical requirement to prevent waste from a clogged drain fr
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: When installing an island fixture vent (loop vent) for a kitchen sink, where must the top of the vent loop be located?
Answer options:
- As high as possible within the cabinet, but below the sink
- At the same elevation as the fixture's P-trap weir ✅ Above the flood level rim of the island sink
- Below the finished floor level
Correct answer: Above the flood level rim of the island sink
Explanation: The top of the loop vent must extend above the flood level rim of the fixture it serves. This is a critical requirement to prevent waste from a clogged drain from flowing over the loop and into the vent portion of the pipe, which would render the vent ineffective.
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
More about Plumber Red Seal
Related Questions
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
- A plumber is considering the velocity of water in a 50 mm (2") copper pipe supplying a commercial building. Ex
- A plumber is designing the domestic hot water recirculation system for a multi-story residential building. Wha
More for Plumber Red Seal candidates
Practice tests
Question explanations
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Plumber Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.