Why would a new pex supply line rupture? It was connected from the faucet to the shut off valve. The compression ring was in place and in the correct position and the nut was tightened with a wrench aprox, 3/4 of a turn passed hand tight. The line was attached with no leaks for about a week and then it separated. I am no stranger to these supply lines, but I have never had one separate on me before. Kinda at a loss. Any suggestions?!?!?!?!?