Plumber Red Seal · Question
When solvent welding a 100 mm (4 inch) ABS drain pipe, what is the recommended minimum cure time before testing the system with water at typical residential pressures (e.g., 200 kPa)?
According to Canadian plumbing codes and manufacturer guidelines for ABS, a minimum cure time of 1 hour is typically recommended before hydrostatic testing a DW
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Question: When solvent welding a 100 mm (4 inch) ABS drain pipe, what is the recommended minimum cure time before testing the system with water at typical residential pressures (e.g., 200 kPa)?
Answer options:
- 15 minutes ✅ 1 hour
- 6 hours
- 24 hours
Correct answer: 1 hour
Explanation: According to Canadian plumbing codes and manufacturer guidelines for ABS, a minimum cure time of 1 hour is typically recommended before hydrostatic testing a DWV system to allow the solvent cement to properly set. Waiting 6 or 24 hours is overly cautious for typical DWV pressures, while 15 minutes is generally insufficient for proper curing of larger diameter pipes.
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