Polybutylene Pipe Problems
Here are sources of information why polybutylene piping used in house plumbing is bad:
Polybutylene Piping – Realtors Beware!
Polybutylene Piping: Concerns, Risks and Resolutions
Be informed about a home’s plumbing system before you buy.
Polybutylene pipes – found during a home inspection
What is Poly B (Polybutylene) Pipe?