I have gotten 3 bad line sets right outta the box(bag?) They are IUSA Cambridge-Lee Industries(made in Mexico). They come in a plastic bag instead of a box. The all had leaks in the liquid line. The first one I saw the holes in it before I ever un-coiled it, the second one got installed and wouldn't pull a 400 micron vacuum. One of the holes was so small I needed a magnigying glass to see it. The 3rd one I put the vacuum pump to it before I put it in the system, and it wouldn't pull down either. The copper seemed real thin... and on further inspection, the LL wall thickness was only .020in. Wasted a lot of time and money on garbage that the supply house carried "because they were trying to save money".
Has anybody else had this problem??