I'm in Phoenix, AZ so no issues with freezing. Can you help me wade through the salesman tales? I've been told they are all superior products and the best for the job. I need to replace the lines next to the trees, shrubs and plants. It's 12 year old poly and it's leaking or not working in all the worst places. I'd really like something that lasted a couple of decades. Does such a beast exist? Thanks for your help.