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Old 02-09-12, 09:59 AM   #49
Helper EcoRenovator
Join Date: Nov 2010
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Closed loop systems typically run at about 10-20 psi and have a pressure relief valve set at 50 psi, so your hose idea should theoretically work fine since car radiators typically run around 15 psi.

Solar Hot Water for Cold Climates: Closed Loop Antifreeze System Components

It would be a little more costly but you could always put on copper unions. This would definitely hold the pressure and still allow you to disconnect the panels if needed.
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