If you have gray pipes strung through the attic, you have them. Call 1-800-356-3496, and tell them you are having problems with it. They will want to know that YOU HAVE HAD LEAKS, before they replace it.: I am being told by my home buyers inspector that I have polybutylene pipes through our house. I believe this right but how do I exactly and positively confirm that my house has PB that is a known problem? Our house is 7 years old and we have had no leaks. If I confirm I have bad PB, what is the easiest and most economical way to appease my buyer. The buyer has requested they be replaced?