Plumber Red Seal · Question
What is the standard minimum trap seal depth for most plumbing fixtures in Canada?
The National Plumbing Code requires a minimum trap seal depth of 38 mm (1.5 inches) for most common fixtures to effectively block the passage of sewer gases whi
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Question: What is the standard minimum trap seal depth for most plumbing fixtures in Canada?
Answer options:
- 25 mm ✅ 38 mm
- 50 mm
- 76 mm
Correct answer: 38 mm
Explanation: The National Plumbing Code requires a minimum trap seal depth of 38 mm (1.5 inches) for most common fixtures to effectively block the passage of sewer gases while not being overly susceptible to evaporation.
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