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 specify as the minimum size of an indirect waste pipe?
Answer: 1¼ inch
The Code requires indirect waste pipes to be at least 1¼ inch in diameter to handle the discharge from indirectly connected fixtures such as food service equipment.
According to the National Plumbing Code, when must a plumbing system be provided with a grease interceptor?
Answer: When required by the authority having jurisdiction for fixtures receiving greasy waste
The Code requires grease interceptors when the authority having jurisdiction determines that greasy waste could impair the drainage system or municipal sewage treatment.
What is the maximum distance permitted between supports (hangers) for horizontal 2-inch copper DWV pipe?
Answer: 1.8 m
Horizontal 2-inch copper DWV pipe must be supported at intervals not exceeding 1.8 m (6 feet) to prevent sagging and maintain proper drainage slope.
According to the Code, what type of trap is prohibited in a plumbing drainage system?
Answer: S-trap
S-traps are prohibited because they are prone to self-siphonage, which can break the trap seal and allow sewer gases to enter the building.
What is the minimum diameter of a floor drain according to the National Plumbing Code of Canada?
Answer: 3 inch
Floor drains must have a minimum diameter of 3 inches to handle potential flooding and allow for debris passage without frequent blockage.
According to the Code, what is the maximum developed length of a 1½-inch trap arm?
Answer: 1.8 m
A 1½-inch trap arm has a maximum developed length of 1.8 m according to the Code, which limits the distance to prevent trap seal loss from siphonage.