The length of lineset depends on a factor like size of installation or how far is from solar collector to the solar tank. Linesets are sold in one length 82 ft. This package includes dual lineset where each have a 82 ft length. Usually this is a optimal solution for solar system. If you need a longer connection you can add an extra lineset and connect them using the stainless steel piping coupling. Remember that couplings are sell in lineset sizes and they have to fit to a right lineset.