Plumber Red Seal · Question
A plumber is performing a test on a newly installed 75 mm ABS DWV vent system. After sealing all openings, they apply an air pressure test. What is the maximum air pressure allowed for an ABS DWV system test, and for what duration should it be maintained, according to typical Canadian code requirements?
According to the National Plumbing Code of Canada, a drainage, waste, and vent (DWV) system can be air tested up to 35 kPa (5 psi) and must hold this pressure f
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Question: A plumber is performing a test on a newly installed 75 mm ABS DWV vent system. After sealing all openings, they apply an air pressure test. What is the maximum air pressure allowed for an ABS DWV system test, and for what duration should it be maintained, according to typical Canadian code requirements?
Answer options: ✅ 35 kPa for 15 minutes
- 70 kPa for 30 minutes
- 100 kPa for 1 hour
- 140 kPa for 2 hours
Correct answer: 35 kPa for 15 minutes
Explanation: According to the National Plumbing Code of Canada, a drainage, waste, and vent (DWV) system can be air tested up to 35 kPa (5 psi) and must hold this pressure for at least 15 minutes. Higher pressures can potentially damage the system or fittings, and shorter durations may not adequately reveal leaks.
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