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Old 12-06-2017, 11:12 PM   #1
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Filling Hydro Hot resevoir

When filling the Hydro-Hot reservoir should I use distilled water every 3rd time or so. Had heard that you don't want to over-concentrate the antifreeze.
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Old 12-07-2017, 01:19 AM   #2
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Unless you have a leak,, I don't think you need add any..
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Old 12-07-2017, 05:17 AM   #3
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If your coach is an Entegra and it came with Century Green fluid, it comes premixed. What make and year is your coach? Pre 2104 Entegra used Camco Pink and that also can be purchased premixed.
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Old 12-07-2017, 08:51 AM   #4
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I agree about the leak. Coming up on 5 years and I have yet to add a drop of fluid. If you are adding fluid you need to find out why.
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Old 12-07-2017, 09:41 AM   #5
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I have a '14 Cornerstone and in the colder months of the year, it seems to go through about 24 oz of coolant. I spoke with Entegra and they said it was the water evaporating out of the pre-mix. Which is why I asked the forum about simpling adding some distilled water.
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Old 12-07-2017, 09:51 AM   #6
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I have to add about a quart or two every year which is normal for boiler evaporation. Most is premixed unless using a concentrate like I use.
Never heard of weakening the fluid mix.
Call AH if your wondering.
Good luck
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Old 12-07-2017, 09:52 AM   #7
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If you need to add water due to evaporation, then distilled would be the way to go. However, I would first check that this is the case. If you add too much water the mix will get weak and could get to the point where you don't have adequate protection. I would get a refractometer (they aren't that expensive and can be used on battery water and engine coolant as well) and check your coolant to make sure it is just the water that is evaporating and not a slow leak someplace where the full premix is exiting the system.
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Old 12-07-2017, 10:38 AM   #8
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On the 2014, the main hose going from the coolant tank to the AH are great for getting brittle and splitting getting a small leak on the bottom side of the hose that is hard to see. If the clear plastic hose is burnt looking, it is time to change it. I was told from a tech that are good for about a year or two depending on use.

The braided hose sold at Lowe's is much stronger and is sold in 1 ft lengths. It takes 5/8 inch hose.https://www.lowes.com/search?searchT...r+vinyl+tubing
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Old 12-07-2017, 11:54 AM   #9
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No one has commented and I assume you know, but since you are asking the question.... let me say. If your AquaHot fluid is yellow/green, then the ONLY fluid you should be adding is Century Transfer Fluid (AKA boiler fluid). It is available through Amazon and other sources. If your fluid is pink/red then it is most likely Camco Boiler Fluid available at Camping World or many other places. Do NOT use anything else, and certainly do not use radiator coolant/antifreeze as that will contaminate. Several owners I know had to have their systems flushed out of a mixture of antifreeze and boiler fluid and then their systems completely refilled.

Also, although Century and Camco will tell you that their products are compatible, never mix pink and yellow as AquaHot will stand behind nothing if there is a problem.
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Old 12-07-2017, 11:56 AM   #10
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Chuck

Is that hose you recommended actually for use in high heat applications? I thought that stuff was not for use in hit applications.

Gary
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Old 12-07-2017, 01:56 PM   #11
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The 5/8" ID that we got with Chucks guidance is rated to 140F

https://www.lowes.com/pd/EASTMAN-7-8...ing/1000180567

We've not installed it yet but its in hand and just needs done.!
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Old 12-08-2017, 07:07 AM   #12
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Quote:
Originally Posted by Gary.Jones View Post
Chuck

Is that hose you recommended actually for use in high heat applications? I thought that stuff was not for use in hit applications.

Gary
The factory install hose is not for heat application and why it gets brittle a cracks. There are different grades of braided vinyl tubing, one is rated for coolants. Here is one on the link rated for heat https://www.lowes.com/pd/Samar-2-in-...ubing/50315957
but I used a standard grade it is is holding up much better than the factory hose that was burnt in the first year.

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