CPVC (Chlorinated Polyvinyl Chloride) and PVC (Polyvinyl Chloride) are both types of plastic piping materials, but they have distinct differences:
1. **Chemical Composition**: CPVC is PVC that has been chlorinated through a free radical chlorination reaction, increasing its chlorine content. This modification enhances its properties.
2. **Temperature Resistance**: CPVC can withstand higher temperatures than PVC. CPVC is suitable for hot water applications, withstanding temperatures up to 200°F (93°C), while PVC is typically used for cold water applications and can handle temperatures up to 140°F (60°C).
3. **Pressure Rating**: CPVC generally has a higher pressure rating at elevated temperatures compared to PVC, making it more suitable for high-pressure applications.
4. **Applications**: PVC is commonly used for drainage, waste, and vent systems, as well as irrigation and cold water supply. CPVC is used for hot and cold potable water distribution, fire sprinkler systems, and industrial liquid handling.
5. **Cost**: CPVC is generally more expensive than PVC due to its enhanced properties and manufacturing process.
6. **Installation**: Both CPVC and PVC are installed using solvent welding, but the solvents and cements used are different due to their chemical compositions. CPVC requires specific CPVC cement.
7. **Color**: PVC is typically white or dark gray, while CPVC is usually off-white, light gray, or yellowish.
8. **Durability**: CPVC is more resistant to corrosion and chemical degradation than PVC, making it suitable for more demanding environments.
9. **Flexibility**: CPVC is slightly more flexible than PVC, which can be advantageous in certain installations.
These differences make CPVC and PVC suitable for different applications, depending on the specific requirements of temperature, pressure, and chemical exposure.