10/27/2026
❄️ PROTECT YOUR UNIT FROM FREEZING ❄️
The following are several options for cold weather servicing. We suggest using rock salt, methanol or a combination of these two ingredients to protect chemical toilets from freezing. Below are listed the amounts of salt, methanol or salt and methanol combined, necessary to protect water from freezing at various temperatures.
SALT
½ lb per gallon of water protects to 28° F. 1 lb per gallon of water protects to 19° F.
1 – ½ pounds per gallon of water protects to 11° F. 2 pounds per
gallon of water protects to 0° F.
Two pounds of salt is the maximum amount that can be dissolved in one gallon of water.
METHANOL
5% or 6.4 ounces per gallon of water protects to 28° F. 10% or 12.8
ounces per gallon of water protects to 22° F. 15% or 19.2 ounces per gallon of water protects to 17° F. 20% or 25.6 ounces per gallon of water protects to 11° F. 25% or 32 ounces per gallon of water protects to 4° F. 30% or 38.4 ounces per gallon of water protects to -4° F.
Caution: Methanol becomes flammable if used in quantities exceeding 33%. Be very careful not to exceed that percentage!
SALT AND METHANOL COMBINED
The amounts of methanol listed below are added to previously mixed solution containing 2 lbs of salt per one gallon of water:
5% or 6.4 ounces per gallon of water protects to -6° F. 10% or 12.8
ounces per gallon of water protects to -11° F. 15% or 19.2 ounces per gallon of water protects to -17° F. 20% or 25.6 ounces per gallon of water protects to -21° F. 25% or 32 ounces per gallon of water protects to -30° F. 30% or 38.4 ounces per gallon of water protects to -40° F.
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