Aqua Hot 450D

[jleamont]

[jleamont]

Jim, I agree 100% Oasis is a much better design. I considered swapping over but the expense was too much. 

[richard5933]

Isn't the concern of running automotive type (toxic) antifreeze in any of these systems on the circulating side due to the risk of a leak forming and the toxic antifreeze contaminating the potable water supply?

[jleamont]

Richard, correct! You never want Toxic Antifreeze in your fresh water circuit. RV Antifreeze for winterizing, no issues.

[wayne77590]

Thank goodness my post was so short with the link to all that has been said, whew!😇

[manholt]

Joe L. Thank you for posting the information from AH.  Hard to argue with the manufacturer!  

Carl

[rcieslak67]

I believe I was successful in winterizing the Aquahot. I talked to a tech expert at Aquahot Corp and he advised me that they recommend the propylene glycol

antifreeze recommended for the cold and warm lines into and out of the Aquahot unit. He said as long as you have pink antifreeze coming out of the

hot and cold drains you should be OK. It get's almost as cold as Wisconsin in Michigan and it is much cheaper to winterize the system until we leave for Florida

for the winter. The other side of the Aquahot does get boiler fluid which as a different composition than either of the other antifreezes.

[manholt]

Correct.  Enjoy Florida! 

[jleamont]

You got it! Sounds like you are all set for old man winter to arrive.