best glycol and mix for my boiler system?

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  hot_rod Posts: 28,708

  December 2025

  here is an option for a glycol fill tank. Pump about 3 gallons of glycol into the tank, connect it to the system at the expansion tank.

  So as air comes out you have a reservoir of glycol.

  A fraction the cost of a fill tank system.

  

  Screenshot 2025-04-25 at 8.13.32 AM.png 1.6M

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  Bob "hot rod" Rohr
  trainer for Caleffi NA
  Living the hydronic dream

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  clydesdale Posts: 85

  December 2025

  Hmmm, I am not sure how that works. Can you break that down for me a bit more? Sorry. Thanks!!!!!!!!

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