On 09/12/2015 02:46 PM, Oren wrote:
On Sat, 12 Sep 2015 15:34:11 -0400, John Somerset
wrote:

The hardware man said heat is used to slide PEX onto these fittings.
Rather than explain it, he gave me a piece of polybutylene.

He told you wrong. Heat is never used.

If I have to replace any more tubing, I want to use PEX. How do I slide
it on to a compression fitting designed for PEX and polybutylene? Is
heat the best way? Would a hair dryer be my best source? Would a
different brand of fitting solve the problem? Would faucet grease do
the trick?

No, not exactly.

Learn how to install PEX on a pipe stub out.
.




I replaced a bad section of pipe about a year ago and used PEX and those
"Sharkbite" fittings...the PEX pushed right in.


The clerk is an idiot and if the stuff does not push right in he must
have sold you something defective.