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Old 12-06-2010, 07:09 AM   #1
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antifreeze in black tank

I am just leaving ontario Can. in a couple of weeks for Yuma and was wondering if i put a gallon of rv.antifreez in the black tank with 10 gallons of water and some deodorizer, using water poured into the potty to flush down only for number 1 for a couple of days till we get to a pump out would this work thanks ....pk42

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Old 12-06-2010, 07:26 AM   #2
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I dont believe the antifreeze is necassary if you will be running the furnace. I think Travelsupreme has ducted heat to the tanks so you should not have a problem.

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Old 12-06-2010, 07:44 AM   #3
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A cup of anti-freeze in 3 gallons of water would be enough for your trip.
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Old 12-06-2010, 01:12 PM   #4
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driving with antifreeze

thanks for the reply, it is a 03 38 ft. TS.but the furnace would not be running while we are driving so I assume it would get pretty cold down there thanks....pk42
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Old 12-06-2010, 01:41 PM   #5
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When you are traveling fluid in the tanks should be sloshing around and that will help prevent freezing, no?
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Old 12-06-2010, 01:56 PM   #6
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I agree with Rick. A couple cups of RV antifreeze should do the trick and can't hurt anytime when traveling in winter.
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Old 12-06-2010, 02:30 PM   #7
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It will depend on how cold it gets on your journey. Take a full jug of antifreeze, good to 50 below, and set it outside. At 18 below celcius you will be lucky to pour it out of the jug. No, it is not frozen but will turn to a heavy slush. Totally different than engine antifreeze. I honestly don't think 1 or 2 cups in your holding tanks will make a difference if temps drop big time.
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Old 12-06-2010, 02:45 PM   #8
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The only time the tank will split is if it's full. As long as there is space in the tank it won't split even if it freezes. That's why water lines freeze because of no space to expand.
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Old 12-06-2010, 02:46 PM   #9
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thanks again I now feel safe in hitting the road.......pk42
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Old 12-06-2010, 05:42 PM   #10
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With the amount of salt urine contains, I wouldn't worry at all about the black tank freezing...
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Old 12-06-2010, 08:10 PM   #11
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Originally Posted by movin-on View Post
With the amount of salt urine contains, I wouldn't worry at all about the black tank freezing...
Oh no... I was 'late' draining mine and it came out slushy...
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Old 12-06-2010, 10:33 PM   #12
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Why put any water in except for about a cup per urine flush? Just add water before you dump when in warm weather.
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Old 12-06-2010, 11:30 PM   #13
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pk42, you will be fine, just pour from your a/freeze jug straight into the toilet and don't worry, as Rich & Radarman suggested. I do it every year when I winterize and have not had any problems in the last 8 + years. Good luck, enjoy your trip and be safe while you travel down the yellow brick road.
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Old 12-07-2010, 08:03 AM   #14
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The tank will probably be fine The pipes and valves may have a problem since they are smaller and less protected.

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