Antifreeze chargeCold-weather additive used in some tank programs.Also called: freeze charge, winter tank chargeDefinitionAn antifreeze charge is a cold-weather tank treatment some providers use to reduce freeze risk. Products and rules vary. Ask what your route uses and whether it fits venue requirements.Related termsWinterization: Cold-weather prep so tanks and sinks do not freeze.Deodorizer: Tank chemical that controls odor after a pump-out.Holding tank: Sealed waste tank under a porta potty.Related guidesWinter Porta Potty Tips for Cold-Weather Sites