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 > Anti-freeze ratio

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time2roll

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Posted: 03/13/19 04:34pm Link  |  Quote  |  Print  |  Notify Moderator

Down in the 20s overnight? Just use the RV as normal with water.

Fill the tank half or more for the night and remove your water connection hose. The fully exposed connection may freeze if left out.

If you must put anti-freeze in the main holding tank search for a freeze chart to give the correct concentration for the exact product you buy.



Example: (propylene-glycol)

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drsteve

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Posted: 03/13/19 05:03pm Link  |  Quote  |  Print  |  Notify Moderator

Automotive antifreeze is ethylene glycol. Propylene glycol has very low toxicity.


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Bobbo

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Posted: 03/13/19 07:33pm Link  |  Quote  |  Print  |  Notify Moderator

SoundGuy wrote:

Bobbo wrote:

It should be 100% water, or 100% antifreeze, or empty. Your choice.


Disagree - there's never any reason to introduce RV antifreeze into any fresh water holding tank, ever. When not in use during the cold weather months it should simply be drained of any residual water and left like that, as should the water heater tank, any water remaining will have plenty of room to expand as it freezes and not cause any issues at all.

I agree that there is no reason to put antifreeze in the fresh water tank. However, I stand by my assertion that an RV's water supply should be 100% water, or 100% antifreeze, or empty. Your choice. If you think there is a useful purpose in partially diluted antifreeze, I am willing to listen.


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wa8yxm

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Posted: 03/14/19 08:21am Link  |  Quote  |  Print  |  Notify Moderator

One thing.. Though unlike Automotive Antifreeze RV antifreeze is NOT TOXIC. it is still nasty stuff. both taste and the effect it will have on you in quanity. (it is a lower level of poison) So I'd never add it to water I plan on drinking.

But then after the fun I had getting rid of it all the first time I used it.. I never used it again.

When traveling in sub-zero I carried water INSIDE the heated RV and did not fill the fresh system till I was sure it was safe.. I'm "Warranted" for 20 degrees.


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Dutch_12078

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Posted: 03/14/19 11:57am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

One thing.. Though unlike Automotive Antifreeze RV antifreeze is NOT TOXIC. it is still nasty stuff. both taste and the effect it will have on you in quanity. (it is a lower level of poison) So I'd never add it to water I plan on drinking.


The propylene glycol used in RV antifreeze is non-toxic and rated as GRAS, “Generally Recognized As Safe”, by the FDA. It is tasteless and practically odorless.

Quote:


Propylene glycol is a synthetic liquid substance that absorbs water. Propylene glycol is also used to make polyester compounds, and as a base for de-icing solutions. Propylene glycol is used by the chemical, food, and pharmaceutical industries as an antifreeze when leakage might lead to contact with food. The Food and Drug Administration (FDA) has classified propylene glycol as an additive that is “generally recognized as safe” for use in food. It is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food
colors and flavors, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions. Other names for propylene glycol are 1,2-dihydroxypropane, 1,2-propanediol, methyl glycol, and trimethyl glycol. Propylene glycol is clear, colorless, slightly syrupy liquid at room temperature. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Propylene glycol is practically odorless and tasteless.


Propylene Glycol - CDC Public Health Statement


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time2roll

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Posted: 03/14/19 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

chast wrote:

We NEVER drink the water from the tanks and the water would only be used for dishes, showers and toilet.
Seems fine to me.
Chart shows about 1:5 AF to water should work.

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