What is the difference between PVC and ABS in plumbing?

PVC (polyvinyl chloride) and ABS (acrylonitrile butadiene styrene) are two types of plastic pipes used in plumbing in Quebec:

PVC:

• Color: White or gray
• Use: Potable water (Schedule 40 PVC), drainage (PVC DWV), irrigation, pools
• Joining: PVC cement (solvent) — requires primer (purple) before cement
• Temperature resistance: Up to 120°F (49°C) for hot water — CPVC (chlorinated) handles 180°F (82°C)
• Advantage: More rigid, better for pressurized water lines
• Cost: $1 to $3/ft depending on diameter

ABS:

• Color: Black
• Use: Drainage, venting, and sewer (DWV only — not for pressurized water)
• Joining: ABS cement (darker solvent, no primer required)
• Temperature resistance: Up to 160°F (71°C)
• Advantage: More impact resistant, better sound insulation
• Cost: $0.80 to $2.50/ft

Important: PVC and ABS cannot be glued directly together. Use a mechanical adapter (transition coupling) when switching from one to the other. The Quebec Plumbing Code accepts both materials for drainage.