Hey, First of all thanks for taking the time to answer a question from a DIY Schlep! To the point, I found a leak. It destroyed a bunch of my sheetrock. I want to fix this right. What you see is a piece of copper, leading to an outdoor spicet. The spicet Is mounted to the exterior wall. What is the correct way to fix this? I apologize if this question had been asked couldn't find it in the forums, where it appears pex is inserted in the copper pipe. Can I just use a compression coupler? Thanks again!