who makes the copper fittings that use the compression tool to finish the connection without sweating?
I just found what you are looking for at Home Depot this week. It is called "Sharkbite" by "Cash Acme". I have never used it but it looks terrific. It will take either coper or PEX. I am planning to split both hot and cold water copper to add hot and cold water PEX for an new kitchen sink in the basement. That will be about 4 weeks off. If it works, and they say it does, it is just what I want.