PVC vs CPVC : Pipe Comparison and 5 Basic Differences

PVC and CPVC are both types of plastic piping materials, but they have some key differences that make them suitable for different applications. Here’s a breakdown:

Material:

• PVC (Polyvinyl Chloride): The standard, widely used plastic piping material.
• CPVC (Chlorinated Polyvinyl Chloride): A modified version of PVC with added chlorine, making it more heat and chemical resistant.

Key Differences:

• Temperature Resistance:
  • PVC: Handles up to 140°F (60°C).
  • CPVC: Handles up to 200°F (93°C).
• Chemical Resistance:
  • PVC: Good resistance to many chemicals, but not strong acids or bases.
  • CPVC: Even better resistance to chemicals than PVC, including some strong acids and bases.
• Flexibility:
  • PVC: Less flexible.
  • CPVC: Slightly more flexible.
• Cost:
  • PVC: Generally cheaper.
  • CPVC: More expensive than PVC.

Applications:

• PVC:
  • Cold water lines
  • Drain lines
  • Sewer lines
  • Conduit for electrical wiring
  • Siding and fencing
• CPVC:
  • Hot and cold water lines
  • Chemical piping
  • Industrial applications
  • Above-ground plumbing

Choosing Between PVC and CPVC:

The best choice for you depends on your specific needs:

• For cold water lines, drain lines, and general-purpose applications, PVC is a good and cost-effective option.
• If you need piping for hot water, chemicals, or high-temperature environments, CPVC is the better choice despite its higher cost.

Additional Notes:

• PVC and CPVC pipes and fittings cannot be used interchangeably. They require different solvents and cements for joining.
• Always follow building codes and manufacturer’s recommendations when choosing and installing piping materials.
• Consult a professional plumber if you are unsure about which type of pipe is right for your project.

PVC vs CPVC