Polybutylene. Home › Forums › Archives › Old Bulletin Board Archives › Polybutylene. This topic has 0 replies, 1 voice, and was last updated 27 years ago by Robert L. Mishler. Viewing 0 reply threads Author Posts 27 Sep 1999 at 10:53 am #283649 Robert L. MishlerMember How can i tell if I have polybutylene in my mobile home? Author Posts Viewing 0 reply threads The forum ‘Old Bulletin Board Archives’ is closed to new topics and replies.