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pulpwood007's avatar
pulpwood007
Explorer
Dec 09, 2020

Diluted RV Antifreeze

RV antifreeze is cheap, but I've always wondered if you diluted the antifreeze with 25% or 30% water, at what temp would it begin to freeze, and fail to protect RV plumbing?

Walmart's SuperTech RV antifreeze states it offers protection to -50F. For folks that live in warmer climates where winter temps never get below +10F, it may well be that a diluted concentration would still offer excellent protection.

I think I may run an experiment in my home freezer...............

23 Replies

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  • Flute_Man's avatar
    Flute_Man
    Explorer
    Dec 09, 2020
    Let us know the results of your test. It probably already comes 50-50 so measure carefully and let us know.
  • Dutch_12078's avatar
    Dutch_12078
    Explorer II
    Dec 09, 2020
    RV antifreeze is already mixed with usually de-ionized water and should be used straight from the jug. It will freeze at low enough temperatures, but the mixture does not expand to cause damage to fittings. Adding more water could upset that no expansion balance. I don't suggest risking it...

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