I have a house that was equipped with poly-butylene plumbing and have already had several problems, I was told by a plumber and my ins. company that there have been several class-action lawsuits regarding this material.
I would be very interested to hear from concerning the problems with your Pb plumbing. ie time since instalation, corrosion, incorrectly installed etc
I am lawyer and I am presently litigating the same issue.
Looking forward to hearing from you at your earliest convenience