don't insult me. I have said nothing against you and it is embarrassing, as you specify yourself here with a simple substantive topic.
I have no reason to answer you.
Here is the website of the Developer of the qick connections, so you can check it yourself:
http://www.legris.com/legris/en_en/h.../vuid/HomePage
Vinyl tubes are not general PVC Tubes from the hardwareshop. Tubes as the famous Tygon use are mixed with hardeners and have a much bigger wall thickness as normal PVC tubes.