Insert the top in the PEX over the top of your fitting. Slide the end of your PEX tubing that has the crimp ring or cinch clamp on it above the tip on the fitting that you choose to screwed on to the copper tubing. Press it on so far https://makeupbrushset43211.snack-blog.com/30861142/indicators-on-1-2-inch-copper-street-90-you-should-know