CPVC (Chlorinated Polyvinyl Chloride) and PVC (Polyvinyl Chloride) are both thermoplastic materials used in plumbing, but they have distinct differences.
1. **Temperature Resistance**: CPVC can withstand higher temperatures, up to 200°F (93°C), making it suitable for hot water applications. PVC is limited to about 140°F (60°C), restricting it to cold water use.
2. **Chemical Resistance**: CPVC has enhanced chemical resistance due to its chlorination, making it more suitable for handling corrosive substances. PVC is less resistant to certain chemicals and is more prone to degradation when exposed to harsh chemicals.
3. **Flexibility and Strength**: CPVC is generally more flexible and has a higher tensile strength compared to PVC, allowing it to handle higher pressure applications. PVC is more rigid and can become brittle over time, especially in cold environments.
4. **Cost**: CPVC is typically more expensive than PVC due to its enhanced properties and manufacturing process. This cost difference can influence the choice depending on budget constraints and application requirements.
5. **Installation**: Both materials are relatively easy to install, but CPVC requires solvent cement specifically designed for CPVC, while PVC uses a different type of cement. This distinction is crucial to ensure proper joint integrity.
6. **Applications**: CPVC is preferred for residential and commercial hot and cold water distribution, as well as industrial liquid handling. PVC is commonly used for drainage, irrigation, and cold water systems.
7. **Regulatory Approvals**: CPVC often meets more stringent building codes and standards for potable water systems due to its superior performance in high-temperature and high-pressure environments.
In summary, the choice between CPVC and PVC depends on the specific requirements of the application, including temperature, pressure, chemical exposure, and budget.