The pipes in the photo on the left run from inside the plumbing lab up to the roof. Bhavin is insulating these pipes and will then connect them to the solar thermal panel. These pipes will be supported by the steel support rods that Bhavin has previously made.
In the photo on the right Bhavin and Danny are harnessed to the roof for safety. Bhavin is stabilizing Danny's ladder as he brazes the pipe to the top corner of the panel with the incoming glycol solution pipeline.