Just a thought but if you want to have a real easy install and you don't need huge lines, use semi air brake tubing. this stuff comes in sizes up to 5/8 or 3/4 I think and its super easy to work with and it doesnt explode! Just a thought! I used this stuff on my air ride install and that was absolutly abused, temp changes, dirt, grimme, and abrasion. The only think it bad for is extreme temperature. I once used it as a temperary setup on a compressor and the heat produced by the compressor made the line go soft, it expanded to about 5 times its size(bulging at that the compressor) and still never burst. Compression fittings with "T"s would work for branch lines. Consider it; it may be what your looking for.