Here's a clear comparison of PVC, CPVC, and UPVC, including their key differences and applications:
1. PVC (Polyvinyl Chloride)
Material: Standard plastic without chlorination.
Temperature Limit: Up to 60°C (140°F).
Pressure Rating: 150–300 PSI (varies by schedule).
Key Traits:
Rigid and lightweight.
Affordable and easy to install.
Not suitable for hot water.
Common Uses:
✔ Cold water supply
✔ Drain/waste/vent (DWV) systems
✔ Electrical conduit
2. CPVC (Chlorinated Polyvinyl Chloride)
Material: PVC with extra chlorine (higher heat resistance).
Temperature Limit: Up to 93°C (200°F).
Pressure Rating: 100–400 PSI (depends on schedule).
Key Traits:
Handles hot water and corrosive fluids.
More flexible than PVC.
Requires special solvent cement (incompatible with PVC glue).
Common Uses:
✔ Hot/cold water distribution
✔ Industrial chemical transport
✔ Fire sprinkler systems
3. UPVC (Unplasticized PVC)
Material: PVC without plasticizers (rigid and durable).
Temperature Limit: Up to 60°C (140°F).
Pressure Rating: Similar to PVC but more brittle.
Key Traits:
Highly resistant to chemicals/weather.
Does not warp or degrade in sunlight.
Used where leaching is a concern (no plasticizers).
Common Uses:
✔ Window/door frames
✔ Outdoor plumbing
✔ Industrial piping (acids/alkalis)
When to Use Which?
PVC: Cold water, drainage, low-cost projects.
CPVC: Hot water, corrosive fluids, fire systems.
UPVC: Outdoor/industrial use, no-leach applications.
Note:
Never use PVC glue on CPVC (requires CPVC-specific cement).
UPVC is not for pressurized hot water (unlike CPVC).
