Solar vacuum tubes natural water flow 10-tube array

[MrArrow1961]

Such setup not correct to reach max system efficiency:. Heat water will go up, if you will have problem with tube installation level, then only ½ of tubes will work more or less efficient. In such systems water collector must be on top and all tubes must be at 45 degree to sun and opening to the top collector.

[THeScoobyNoob]

Great Idea. I hope that is cpvc and not pvc pipe because pvc is only rated to around 85f and will disintigrate under high heat in time.