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Old 11-12-2014, 09:57 AM   #1
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RV Anti-Freeze in black and gray tanks.

We are in our first year of full time and we currently are stay in south Tenn. for the time being because of a family issue. The week temps. will be daytime 40's night in the low 20's. Can we put RV antic-freeze in the gray and black tank to prevent freezing issues that might occure.

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Old 11-12-2014, 10:02 AM   #2
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Absolutely you can. No problems with that!

Use according to instructions, just dump some down the toilet for black water and sink for gray water.

Best wishes!
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Old 11-12-2014, 10:05 AM   #3
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Absolutely you can. No problems with that!

Use according to instructions, just dump some down the toilet for black water and sink for gray water.

Best wishes!

I want to be clear, the RV will not be winterized, we will be staying inside.



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Old 11-12-2014, 10:35 AM   #4
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You can use that or add some water softener salt. That will keep it from freezing as well. Use whichever is most economical.
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Old 11-12-2014, 10:48 AM   #5
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I'm not familiar with your motorhome but aren't the holding tanks in a sealed, insulated compartment?
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Old 11-12-2014, 10:50 AM   #6
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I want to be clear, the RV will not be winterized, we will be staying inside.



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As long as you are running your furnace your tanks will be (or should be) being kept from freezing as well.

See page 69 of your owner's manual (link provided below)

Either way, the anti-freeze can be used whether or not you are winterized.

http://fleetwoodrv.com/partsandservi...PROVIDENCE.pdf
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Old 11-12-2014, 11:18 AM   #7
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A little ice melt will work too. Windshield washer anti-freeze will work too and it's cheaper than RV AF.
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Old 11-12-2014, 11:33 AM   #8
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A little ice melt will work too. Windshield washer anti-freeze will work too and it's cheaper than RV AF.
I am not sure what effect Ice melt might have on any seals or gaskets. However the windshield washer anti freeze should work ok.

To be honest I agree with saving money but the cost of Rv anti freeze is so minmal compared to the cost of operating a class a that using the correct fluid IE Rv antifreeze should not be a problem.
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Old 11-12-2014, 11:34 AM   #9
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You can use that or add some water softener salt. That will keep it from freezing as well. Use whichever is most economical.
Excellent idea...how much water softener salt would you say? Like a cup per 10 gallons or so?
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Old 11-16-2014, 11:31 AM   #10
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Please do NOT use windshield washer anti-freeze anywhere in your RV plumbing. This stuff is toxic to septic systems and chances are when it comes time to dump your tanks you will be doing so in a campground that uses a septic system to process sewage.
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Old 11-16-2014, 11:38 AM   #11
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Pour a little RV antifreeze ( pink stuff) down there and be done with it.
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Old 11-16-2014, 11:44 AM   #12
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under normal circumstances, the rv antifreeze will do just fine. especially if you have enclosed tanks. be aware that drastic below temps will give you problems if no antifreeze is used. even heated tanks will give you problems below zero
i worry more about the valves than the tanks. been there done that. they are fun to repair at zero.
if your tanks freeze. fill them with hot water if not full. that should defrost them enough to eventually get them dumped.
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Old 11-16-2014, 12:03 PM   #13
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We left home in January -30 headed south no stop 24 hours till we got to warmer weather , we use rv antifreeze to flush the toilet till it was warm enough to put water in the holding tank(our tanks Are not heated, there's no problem using rv antifreeze
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Old 11-16-2014, 08:47 PM   #14
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If your living in coach you will have your heat on and most furnaces supply heat to the tank areas to prevent freezing. You need to have water in fresh tank for living also.
Here is info to do just that or if not that information also.
Anti and water do not mix the slush will freeze eventually.
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