I have 2 inch pipes for the pumps, However my Solar panels are 1.5". I have a pretty long run to the panels. 1.5 inch would be easier to work with since weight and cost is lower. Should I run 1.5" pipe up to the roof or use 2" pipe then reduce the diameter at the panel.
the way my roof is to the equipment pad. I have 4 2x20 panels. To have it self draining I need to install the panel
Horizontally - water flowing across side ways. or strap the panel over the apex of the roof.
Can those configuration work?