TempRite® Chlorinated polyvinyl chloride, or CPVC, is a thermoplastic which is produced by the post-chlorination of polyvinyl chloride (PVC) resin. CPVC typically contains 65-67% chlorine, compared to 55-57% for standard PVC. Its importance as an engineering thermoplastic is due to its relatively high glass transition temperature, high heat distortion temperature and chemical inertness; it also has outstanding mechanical, dielectric, and flame and smoke properties.
Many CPVC compounds conform to potable water regulations. It is compliant with most international standards and is approved by international agencies including NSF International. It also has excellent resistance to the formation of biofilms. Products made from or including CPVC offer outstanding heat resistance, flame and smoke performance, and weatherability. CPVC can be both downcycled and recycled, and many local recycling protocols allow for CPVC to be integrated into recovery and recycling systems intended for PVC.

• Resistance to corrosion and chemical attack. CPVC often
replaces metals to provide longer service-life in handling corrosive
materials such as aggressive water, mineral acids, caustics and other
aqueous solutions.

• Mechanical strength at high temperatures.
Compared with many thermoplastics, TempRite CPVC has excellent
mechanical strength over a broad temperature range. These long-term
mechanical properties enable CPVC to be used in pressure pipe applications
for up to 50 years at temperatures as high as 203°F (95°C).

• High purity. TempRite CPVC is approved for potable water applications worldwide
by several organizations.
Potable Water Approvals
USA: NSF International
Germany: Deutscher Verein des Gas-und Wasserfaches (DVGW)
UK: Water Research Council (WRC)
Canada: Canadian Standards Association (CSA)
Holland: Keuringsinstituut voor Waterleidingartikelen (KIWA)
These approvals are based on extraction studies which have verified that ingredients such as heat stabilizers do not migrate from CPVC at levels that would be unsafe. Generally, TempRite CPVC compounds do not contain plasticizers, flame retardants, biostabilizers or anti-static agents. Heat stabilizers are added to the resin to prevent decomposition during high-temperature molding or extrusion, but these are not lead- or cadmium-based and present no health hazards.

• Flame resistance and low smoke generation in fires. Because of its low petroleum content, CPVC is self-extinguishing and has a relatively low smoke generation. CPVC has a much higher Limiting Oxygen Index (LOI) value than many
other common materials of construction, thus it will not support combustion under normal atmospheric conditions. Also, any smoke that is generated from CPVC is no more toxic than that from traditional building materials.  
TempRite® is a registered trademark of Lubrizol.