I'm going to be installing solar heater panels for my pool soon. I have been thinking about a few problems i have and can't decide what to do. The best place to put my panels where they won't be shaded half the day, will be about 100' away and about 5' higher from the pump which is an Intelliflo. The pool uses 1 1/2" piping and i am going to use 2" piping to and from the solar panels to reduce friction loss. It goes directly across a driveway but i could close that driveway and reroute around it if need be. If i place the pipe underground would i have much thermal loss and/or how could i insulate it being buried.