There is a class action lawsuit involving pex that the members here should be aware of:
http://www.zurnclassaction.com/
personally, the more I hear about pex pipe and rubber liners, the happier I am I went with copper and steel.
http://www.zurnclassaction.com/
personally, the more I hear about pex pipe and rubber liners, the happier I am I went with copper and steel.