On Tue, 25 Jun 2013 22:19:56 +0000 (UTC), "Danny D."
wrote:

On Tue, 25 Jun 2013 07:09:59 -0700, Oren wrote:

That is an insert for the 3/4 PVC. The poly is pushed in. It can be
pulled out, but can be a little difficult. Twist and pull. Twist and
pull.

You weren't kidding it was hard to pull out (the Chinese finger lock
description is apropos). I had to pull hard, with pliers:

http://www1.picturepush.com/photo/a/...g/13410474.jpg

Of course, I forgot to think ahead; so, um .... I now have a brand
new 80psi leak in my plumbing!

http://www3.picturepush.com/photo/a/...g/13410476.jpg

Put a short piece (12" of so) of old poly in the insert and use the
tape or "figure 8" until you get ready for new poly. Remove it for
the new poly. That will stop the flooding for now.

Honestly, I've never seen one of the compression fittings leak.