Cleaning Copper HERMS Coil

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k-brews

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Recently bought a HERMS e-brewery set up and had some questions about cleaning the HERMS coil.

The coil is copper, and I am trying to get a solid answer on the best way to clean the inside of the coil. I have read vinegar, PBW, acid, etc. My main goal is to make sure no verdigris accumulates inside of the coil. Will circulating either vinegar or PBW through the coil using my pumps get the job done?
 
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