I am currently performing some work at my house and amongst one of the improvements I have been working on is to replace all the copper piping under the house with pex. Thus far good yet, I am installing some new fixtures like new sinks and showers and guess what! I have called several plumbers and they do not want to work with PEX. I asked why they would not work with pex? They say because it is known to leak. I would agree that if you do not properly crimp the pex to the brass fitting off course I will agree that leaks will happen. Other than that I disagree with the change from copper to pex. Any comments, experiences, or suggestions? Please some input would be appreciated.