Insert the end of your PEX in excess of the end on the fitting. Slide the end in the PEX tubing which includes the crimp ring or cinch clamp on it more than the tip of your fitting which you screwed on to the copper tubing. Drive it on so https://shintarot630ehk1.bloggadores.com/30363372/1-1-2-dwv-copper-90-fundamentals-explained