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Redstone

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Posts: 3
Reply with quote  #1 
What slope would be the minimum I should have to ensure that the pipes are indeed empty in a drainback system?

In other words for say ever foot or yard, or whatever in length it should have a rise of "X" to ensure that it drains back well enough so there won't be any freeze blockages.

That is Minimum,  of course vertical is optimum. but what is a nominal value also?

Joe

SolarInterested

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Spam Stomper
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Posts: 1,027
Reply with quote  #2 
"The slope should be at least 1/8 th inch per foot, but 3/16 th or a 1/4 inch is better." (link)
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Both temperature rise and airflow are integral to comparing hot air collectors
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