National Plumbing Code of Canada Flashcards
6 cards from real 306A practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 National Plumbing Code of Canada flashcards as text
What does the Code define as a 'wet vent'?
Answer: A vent that also serves as a drain for one or more fixtures
A wet vent is defined as a vent pipe that also serves as a drain for one or more fixtures. It must be sized to handle both the drainage and venting functions.
According to the Code, what size must a wet vent be if it serves a water closet?
Answer: 3 inch
A wet vent serving a water closet must be at least 3 inches in diameter to handle the combined drainage and venting load without restricting either function.
What is the Code requirement for the grade of underground drainage piping?
Answer: Minimum 1 in 50 for pipe 3 inches and smaller
Underground drainage pipe 3 inches and smaller requires a minimum grade of 1 in 50. Pipes 4 inches and larger may use a minimum grade of 1 in 100.
According to the Code, what is the minimum size of a relief vent?
Answer: Half the diameter of the pipe it serves
A relief vent must be at least half the diameter of the pipe it serves, ensuring it can equalize pressure effectively in the drainage system.
What does the Code require for piping that passes through a concrete floor slab?
Answer: A sleeve or casing must be provided to allow pipe movement
The Code requires a sleeve or casing around piping passing through concrete slabs to allow for differential movement and to protect the pipe from damage during concrete curing and structural settlement.
According to the Code, what is the maximum number of water closets that can be connected to a 3-inch horizontal branch?
Answer: 3
A 3-inch horizontal branch can serve a maximum of 3 water closets, as each water closet contributes a significant fixture unit load and the branch has a limited capacity.