Trying to connect poly 1/2 inch tubing to any kind of compression coupler or tee is without a doubt one of the most difficult things I have ever done in my life. I am not a weak person. Using all of my strength and energy, I used the appropriate 'pushing and twisting' motion with a piece of tubing cut at the appropriate 15-degree angle and am absolutely unable to push it in more than about 1 billionth of an inch. I am amazed that everyone is talking in this forum as if this were not an issue. I would like to see the inventor of this horrific gadgetry intubated with his own tubing. If the couplings were male, they would be easy to insert into the flexible tubing. Is there some kind of Secret Drip Irrigation Tubing Connection Club that I need to join in order to find out a solution?