this is at a friends house.....he was going to build some solar panels (a lot of backpackers pass through and do some work for their keep)...but on impulse he picked up a 16 tube collector kit and the control unit , it seems to be missing some stuff though
the missing bits can be traced (i think) but the plumbing is a bit confusing...
on the left there is an air trap unit ....any one know how the trap is plumbed in ?...