uPVC vs CPVC Pipes: Differences, Temperature Limits and Uses

Both uPVC and CPVC start as polyvinyl chloride, and both make rigid, corrosion-resistant pipe. The difference is chemistry: CPVC (chlorinated polyvinyl chloride) has extra chlorine added during manufacture, which raises the temperature it can handle. uPVC (unplasticized PVC) is PVC without plasticizers, so it stays rigid but has a lower temperature ceiling.

uPVC vs CPVC comparison

Two common myths

• "uPVC cannot be used for drinking water." This is not correct. uPVC pressure and plumbing pipes are widely used for drinking water supply, and Vinyl describes its pressure pipes and plumbing pipes as safe for drinking water.
• "CPVC bends and uPVC does not." Both are rigid plastic pipes. Neither bends like flexible HDPE pipe.

Which one should you choose?

1. Look at the water temperature first. If a line carries hot water, use a pipe whose rated temperature and pressure are above your working conditions. For hot water lines, CPVC is the material to look at.
2. For cold water and general use, uPVC is the usual choice. Borewell casing and column pipes, irrigation lines, drainage and water supply are all standard uPVC applications.
3. Check the rating printed on the pipe. Temperature ratings fall as pressure rises, and they vary by standard and manufacturer.
4. Match the fittings and solvent cement to the pipe material. Do not mix uPVC and CPVC cements or fittings without the manufacturer's advice.

Frequently asked questions

Is CPVC better than uPVC?

Neither is better in general. CPVC is designed for higher temperatures, while uPVC is the economical, proven choice for borewells, irrigation and drainage, where its temperature rating is enough.

Can uPVC carry hot water?

Only within its rated temperature and pressure. Vinyl's column pipe, for example, is rated up to 60°C. Confirm the rating of the exact product before using any pipe for hot water.

Which lasts longer?

Both last for decades when used within their rating. Vinyl's uPVC column pipes have a life expectancy of over 50 years in borewell service.

Not sure which pipe your project needs? Contact Vinyl Pipes with your temperature, pressure and size.