Potential Health Hazard of PP-R Pipe Degradation in Potable Water

A recent case study reveals how degraded PP-R pipes may release loose fibers into drinking water, raising new questions about long-term safety and material selection in potable water distribution systems.
Oct. 2, 2025

This case study explores a real-world re-piping project at a Southern California residential complex, where PP-R piping degraded after 10 years of service. Engineers replaced the system with Corzan® CPVC, prompting a deeper investigation into the failure.

Key insights include:

  • How chlorine-based disinfectants accelerate PP-R degradation
  • The limitations of sacrificial antioxidants in pipe longevity
  • Evidence of loose glass fibers within cracked pipe interiors
  • Potential implications for water quality and public health

Read the full case study to:

  • Understand the science behind PP-R pipe failure
  • Learn how environmental factors affect piping performance
  • Discover why CPVC may offer a safer, more reliable solution