Steve,
It's my understanding that food grade propylene glycol is rated by the amount of fly ash that is in it. Regular propylene has more fly ash. If the existing glycol is in fact food grade and your putting in food grade, shouldn't be a problem. Also, I really don't understand the need for food grade, you would need a leak in the glycol line, and a leak in the beer line near the same spot for it to ever come in contact with each other. Maybe someone else would like to enlighten us?
Vern
|