hello every one,I bought a class c last summer that needed some mechanical work.long story short is most mechanical work is done and looking forward to taking a few trips this summer.. It has been sitting for a few years and was winterized the entire time it sat.. however someone put about 5 gallons of the antifreeze in the tank.my question is whats best to clean it out and is the tank still safe to use for fresh potable water????

Do you know what kind of antifreeze? Potable or not potable?

Drain it, flush it WELL. flush lines, If it was RV antifreeze, OK to drink, Radiator antifreeze, flush a lot more with city water, Maybe do the bleach sanitize thing, OK to use. Either case may have a bit of residual odor or taste, should not be any problem health wise. It will go away, but may take a while. Reason to use city water is for the chlorine used to purify. Bleach cycle does the same, bleach taste is better than antifreeze.

I am not sure what type it is.. it is redish color so I would assume it is the rv potable stuff.. I do know it stinks pretty bad.. I opened the faucet on the galley sink before I knew it was in the tanks and a really bad odor came out that sent me outside gagging..

Non-potable antifreeze is TOXIC! You could get it tested to determine what it truly is. If non-potable you need to investigate your options regarding making the tank safe for potable use. If potable many flushes with a bleach treatment would be in order. After the notes period of time the tank may be beyond regeneration. How accessible is the tank?

the tank is easy to get to. looks easy to remove.. hardest part I can see to take it out would be the drain goes through the side of the body.. other than that its under the seating area behind the drivers seat..

antifreeze in fresh water tank | Good Sam Community

jking006
Explorer
Apr 30, 2016
I am not sure what type it is.. it is redish color so I would assume it is the rv potable stuff.. I do know it stinks pretty bad.. I opened the faucet on the galley sink before I knew it was in the tanks and a really bad odor came out that sent me outside gagging..
Johno02
Explorer
Apr 30, 2016
Drain it, flush it WELL. flush lines, If it was RV antifreeze, OK to drink, Radiator antifreeze, flush a lot more with city water, Maybe do the bleach sanitize thing, OK to use. Either case may have a bit of residual odor or taste, should not be any problem health wise. It will go away, but may take a while. Reason to use city water is for the chlorine used to purify. Bleach cycle does the same, bleach taste is better than antifreeze.
vic46
Explorer
Apr 30, 2016
Do you know what kind of antifreeze? Potable or not potable?

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