What kind of anti-freeze to use in 2000 LXI Aqua-Hot?

[Jerry Elkins]

You can tell which to use by the size of the cap on the Aqua Hot tank. It it uses ethylene glycol it will have a large radiator type cap (about the size of a coffee cup). It is uses propylene glycol it will have a smaller cap (about the size of a tea cup). Suggest you call Aqua-Hot again with you model number/serial number. Ask to speak to Don. You can add propylene glycol to ethylene glycol. Early Aqua Hot units had the copper pipe carrying water bonded to the antifreeze tank outside the tank. Current models have the copper tubing inside the antifreeze tank. Ethylene glycol is poisonous where ethylene glycol is not. If there is doubt as to what antifreeze you have, use propylene glycol (can't tell by color). 50/50 with water.

Jerry & Coleen
2005 Allegro Bus

2005 Jeep Rubicon
Whitney, Texas

On Jun 3, 2010, at 10:11 AM, luckyron1 wrote:

I note that the tank is a little low on the aqua, blue/green colored fluid so I called Aqua-Hot for this and even with an Aqua-Hot serial number the man couldn't give me a definitive answer. In 1999/2000, he said, Aqua-Hot used/recommended Etheylene Glycol (green) in their manufactured units. However, the man said that he knew that BB used Prophylene Glycol (could be just about any color) instead. I'd hate to wind up with a bad mixture. Anyone?? Thanks.



Ron & Ruth

2000 LXI in MN