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Old 12-22-20, 11:14 AM   #45
Helper EcoRenovator
Join Date: Mar 2012
Location: Warwick, Rhode Island
Posts: 85
Thanks: 21
Thanked 27 Times in 16 Posts

Originally Posted by SimpleManLance View Post
I just checked out both your systems. very cool! On your drain back system, don't you need some sort of a vacuum break to get the water to drain back into the 6 gallon tank?
To answer your question YES...

Even though the water being pumped up to the collectors was returning to my drainback tank in the basement I added a T fitting and ball valve to the pipe entering the small drainback tank up on top. I then opened the ball valve just a crack to allow air to enter while water was draining back into the tank. By doing that the returning water returned much faster then without the ball valve air opening.

I also went up on the roof and installed a vacum break type valve at the highest point where hot water leaves collectors on route back to drain back tank. This valve allows a pinch of air into piping as water flows by but will not allow water to leak out. Just perfect for the application.

any other questions just let me know.
I love talking about all this solar stuff.

Pat from Warwick, RI

Please Note:
Comments and/or suggestions I make here at the forums on 'your' projects as well as my own have all been carefully and scientifically calculated by 'the seat of my pants'
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Last edited by solarhotairpanels; 12-28-20 at 06:48 PM.. Reason: I added additional information to my previous post.
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