CPVC
CPVC (chlorinated PVC) handles higher temperatures than standard PVC, up to about 90–95 °C, with excellent chemical resistance and flame retardance. It is used for hot water and hot chemical piping, fittings and process equipment parts.
What it is
Extra chlorination raises CPVC's glass transition temperature, so it keeps rigidity and pressure rating at temperatures where PVC softens. It also resists corrosive chemicals and is self-extinguishing.
CPVC pipes and fittings are joined by solvent cement, and sheets and rods are machined into valve and pump components.
Typical applications
- Hot water plumbing
- Hot chemical process piping
- Valves and fittings
- Plating and chemical plant components
- Fire sprinkler systems (listed grades)
Materials & grades
- CPVC pipes and fittings
- CPVC sheet and rod
Points to consider
- Costs more than PVC; use it where temperature demands.
- Pressure rating falls as temperature rises.
- Use CPVC-specific solvent cements.
- Check chemical compatibility for aggressive solvents.
Frequently asked questions
What is the difference between PVC and CPVC?
CPVC is chlorinated further, allowing use at higher temperatures (about 90–95 °C versus about 60 °C for PVC).
Is CPVC suitable for hot water?
Yes. CPVC is widely used for hot water plumbing and hot chemical lines.
Can PVC fittings be used with CPVC pipe?
They shouldn't be mixed; use CPVC fittings and CPVC solvent cement for correct ratings.