Hydro Hot Fluid

[Spdracr39]

So what is everyone doing now that finding the Camco pink juice is like finding a Unicorn? I may have drain the system to fix the leak so I suppose I could flush and switch to the green stuff but wonder what options y’all suggest that I hadn’t thought of. I was also wondering about the system volume vs tank volume.

[Spk64]

When I flushed out our system it had the green and I went back with the same following the install manual recommendation.
“It is recommended to use either an Ethylene-Gylcol or Propylene-Gylcol based Antifreeze for all Hydro-Hot installations.”
Below is my write up on a Newmar but should be close for your coach. Looks like I got about 4 gallons from the boiler and 2 more gallons from the lines on our coach.
https://www.irv2.com/forums/f103/200...ce-243811.html

[Steve and Linda's APEX]

Originally Posted by spdracr39

So what is everyone doing now that finding the Camco pink juice is like finding a Unicorn? I may have drain the system to fix the leak so I suppose I could flush and switch to the green stuff but wonder what options y’all suggest that I hadn’t thought of. I was also wondering about the system volume vs tank volume.

Just purchased three quarts of Camco pink concentrate from CW. Mix each quart with 2 quarts distilled or RO water.

[Spdracr39]

Originally Posted by Steve and Linda's APEX

Just purchased three quarts of Camco pink concentrate from CW. Mix each quart with 2 quarts distilled or RO water.

They are out as is everyone else. I will probably just let it be backordered. My leak only occurs when running the diesel so I can probably get by till it shows up. Using the century pink is a lot more expensive than the camco.

[Spdracr39]

Originally Posted by Spk64

When I flushed out our system it had the green and I went back with the same following the install manual recommendation.
“It is recommended to use either an Ethylene-Gylcol or Propylene-Gylcol based Antifreeze for all Hydro-Hot installations.”
Below is my write up on a Newmar but should be close for your coach. Looks like I got about 4 gallons from the boiler and 2 more gallons from the lines on our coach.
https://www.irv2.com/forums/f103/200...ce-243811.html

That's a great write up and will be very helpful in finding my leak. I don't have the luxury of easy access to the back of the unit so seeing your pics is a lifesaver !

[Cat320]

My coach was manufactured in Nov 13, the AH manual says the coolant should be "propylene glycol that is recognized as GRAS (Generally Recognized As Safe)."

[Milford 47]

Originally Posted by Spk64

When I flushed out our system it had the green and I went back with the same following the install manual recommendation.
“It is recommended to use either an Ethylene-Gylcol or Propylene-Gylcol based Antifreeze for all Hydro-Hot installations.”
Below is my write up on a Newmar but should be close for your coach. Looks like I got about 4 gallons from the boiler and 2 more gallons from the lines on our coach.
https://www.irv2.com/forums/f103/200...ce-243811.html

I have never read anywhere in the domestic heater manuals of using Ethylene Glycol as it is not GRAS and so typically any fluid that possible could contact Potable water is typically Propylene Glycol

Interesting for sure

[Spk64]

Originally Posted by Milford 47

I have never read anywhere in the domestic heater manuals of using Ethylene Glycol as it is not GRAS and so typically any fluid that possible could contact Potable water is typically Propylene Glycol



Interesting for sure

That is what was in my unit upon receipt and is clearly listed in the manual for the HydroHot.
Do not quote me on this as it was sometime ago that I read about it but there may be a difference in boiler construction.
Freshwater exchanger inside the boiler vs outside the boiler.
Inside would be a much bigger concern. Outside would require multiple failures.

[96 Wideglide]

Originally Posted by Spk64

Freshwater exchanger inside the boiler vs outside the boiler.
Inside would be a much bigger concern. Outside would require multiple failures.

Yeah, that is the difference.

Your model must have been built when they ran the fresh water coil outside the boiler fluid.

[Spk64]

In some quick research looks like 2002 and beyond the change was made and the need for GRAS boiler fluid.
Pre-2002 heat exchanger is on outside.

[Milford 47]

Originally Posted by Spk64

In some quick research looks like 2002 and beyond the change was made and the need for GRAS boiler fluid.
Pre-2002 heat exchanger is on outside.

any exchanger that has non GRAS fluid for a heat medium exchange that might contact potable water must be double walled and have a fail safe exit for the fluid

so apparently the prior 2002 were a different design