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The length of the tube is a little over 12" but when you order it comes in 14 or 15". There is a lot of information online about how to do it. There is some info about using PVC but I wouldn't recommend it. Going back to factory specs always seems the best. I will tell you that I used the flaring tool but had to purchase a threaded rod to make up the length. The hard part was the angle not purpandicular to the tool. I ordered the tool from Twin Cities Marine. Make sure you heat the tube first. These are all suggestions to think about. Good luck.