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 is the minimum size of a building drain serving a single water closet according to the National Plumbing Code of Canada?
Answer: 3 inch
The National Plumbing Code of Canada specifies a minimum 3-inch diameter for a building drain serving a water closet to ensure adequate flow and prevent blockages.
According to the Code, what is the maximum distance a P-trap can be from the vent connection?
Answer: 1.2 m for 1¼ inch trap
The Code limits the trap-to-vent distance to 1.2 m for a 1¼-inch trap arm to maintain the trap seal and prevent siphonage.
What minimum slope is required for a 4-inch horizontal drainage pipe in the National Plumbing Code of Canada?
Answer: 1 in 50 (2%)
A 4-inch horizontal drain requires a minimum slope of 1 in 50 (approximately 2%) to maintain self-cleansing velocity and prevent solid deposits.
How many fixture units does a standard bathtub have according to the National Plumbing Code of Canada?
Answer: 2 fixture units
A bathtub is rated at 2 fixture units in the National Plumbing Code of Canada, reflecting its moderate water demand and drainage load.
What is the minimum depth of a trap seal required by the National Plumbing Code of Canada?
Answer: 50 mm
The Code requires a minimum trap seal depth of 50 mm (approximately 2 inches) to prevent sewer gases from entering occupied spaces.
According to the Code, when is a backwater valve required on a building drain?
Answer: When fixtures are below the level of the street or the manhole cover
A backwater valve is required when fixtures are installed below the level of the adjacent street or manhole cover to prevent sewage backup during surcharge conditions.