Plumber Red Seal · Question
An air admittance valve (AAV) is used in a specific application approved by the local authority. According to NPC guidelines, where must it be installed?
AAVs must be installed in an accessible location with free air circulation so they can function correctly by drawing air into the DWV system. They must be insta
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: An air admittance valve (AAV) is used in a specific application approved by the local authority. According to NPC guidelines, where must it be installed?
Answer options:
- Below the flood level rim of the fixture it serves
- In an unventilated attic space
- At least 150 mm above the insulation in an attic ✅ In an accessible location with adequate ambient air
Correct answer: In an accessible location with adequate ambient air
Explanation: AAVs must be installed in an accessible location with free air circulation so they can function correctly by drawing air into the DWV system. They must be installed above the trap weir and may not be concealed in a non-ventilated space.
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.