Plumber Red Seal · Question
A plumber is installing a 51 mm (2 inch) trap arm for a laundry tub. What is the maximum developed length permitted for this trap arm, according to the National Plumbing Code of Canada?
For a 51 mm (2 inch) trap arm, the National Plumbing Code of Canada permits a maximum developed length of 2.4 metres. Exceeding this length can lead to trap sea
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Question: A plumber is installing a 51 mm (2 inch) trap arm for a laundry tub. What is the maximum developed length permitted for this trap arm, according to the National Plumbing Code of Canada?
Answer options:
- 1.2 metres
- 1.5 metres ✅ 2.4 metres
- 3.0 metres
Correct answer: 2.4 metres
Explanation: For a 51 mm (2 inch) trap arm, the National Plumbing Code of Canada permits a maximum developed length of 2.4 metres. Exceeding this length can lead to trap seal siphoning or back-pressure issues.
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