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"Propylene glycol is a viscous, oily fluid which is commonly used in many products. We use it as an antifreeze in our solar water heating applications. Food grade propylene glycol is safe for drinking and is non-toxic. If your system fails or leaks and mixes with your water supply, there is no need to worry about the effects from drinking it incase the leak is not discovered immediately. In the case of ethylene glycol, someone drinking the fluid risks the chances of poisoning and even death.

Propylene glycol also does not have corrosivity to metals like ethylene glycol does and it... [Read More]