Afternoon,
My refrigerator water line has a small hole in it. I purchased a refrigerator water line kit. In it was a plastic and copper farrow and screw caps. I believe the directions are asking me to put the cap on then the farrow then screw it back on. The only problem is the cap and farrow just slide off from the water pressure. Help.

Try putting the tubing into the coupling then slide the ferrow down to the coupling then slide the nut down over the farrow and tighten.