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Old 09-27-2015, 07:37 PM   #1
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Anti Freeze in water holdig tank

Hi Everyone,

In the mid-west his fall weather is great for camping.

As many of us get ready to prepare our RV's for winter, I plan to drain all water lines and put anti-freeze in them. However, I want to fill water holding tank for use with the toilets during the winter when weather permits me to get to the camper.

How much anti freeze do you think I will need to put into the holding tanks to keep from freezing?

We can take showers in the "shower house" and use portable water for brushing teeth and cooking.

We will remember to put anti freeze in bath "p" trap after each visit to the camper and know not to use kitchen sink or shower. As well as anti freeze on the inside toilet ring/gasket.

I think, I have ~35-50 gallon holding tank.

Has anyone done this before?

Thanks for your comments.
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Old 09-27-2015, 07:50 PM   #2
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IMO, don't put antifreeze in your fresh water holding tank. It will take you forever next spring to get it all out. Do a complete winterize, including draining your fresh water tank. If you're going to do some cold weather camping, bring a couple jugs of RV antifreeze, use it to flush your toilet. Just my option, even though I don't do the cold weather camping.. others that do might have a better suggestion.
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Old 09-28-2015, 10:06 AM   #3
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Originally Posted by gashog View Post
IMO, don't put antifreeze in your fresh water holding tank. It will take you forever next spring to get it all out. Do a complete winterize, including draining your fresh water tank. If you're going to do some cold weather camping, bring a couple jugs of RV antifreeze, use it to flush your toilet. Just my option, even though I don't do the cold weather camping.. others that do might have a better suggestion.
I agree....if you store RV antifreeze in your fresh water tank for some time, you will be dealing with that forever.
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Old 09-28-2015, 11:41 AM   #4
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Why not use a compressor and just blow out the lines each time when you're breaking down the camper? We camp down here all winter even go up to the mountains. Lowest temps while camping so far was 15 at night and 30 daytime. No issues so far. Before you leave just blow out the lines and then you don't need antifreeze at all except for p traps.
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Old 09-28-2015, 01:08 PM   #5
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I blow out lines twice. Anti freeze in p traps only. No problems. Remember outside shower.
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Old 09-28-2015, 08:52 PM   #6
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Why not use a compressor and just blow out the lines each time when you're breaking down the camper? We camp down here all winter even go up to the mountains. Lowest temps while camping so far was 15 at night and 30 daytime. No issues so far. Before you leave just blow out the lines and then you don't need antifreeze at all except for p traps.
Agree! Something I might try this winter after draining the lines and keep water in the fresh water tank, is to lay an electric blanked over the tank, which is located below our bed. I can plug it in whenever I think it'll get down below 28 or so. The blanket will also cover the pump. I'll also put a small, heater inside just to keep the camper somewhat warm.
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Old 09-28-2015, 09:10 PM   #7
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well, how about bringing a 5 gal water jug and pull it in using your antifreeze inlet to your pump? That way you can drain the fw tank and let it dry.
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