Which material is NOT typically used as a freezing protection for CPVC pipes?

CPVC (Chlorinated Polyvinyl Chloride) pipes are susceptible to freezing, which can lead to pipe breakage and system failure. Common methods of freezing protection include the use of various antifreeze solutions.

Glycerin, antifreeze, and water-based solutions are all considered suitable materials for preventing the freezing of fluids in CPVC pipes. These substances lower the freezing point of water, allowing for the continued flow of fluids without risk of freezing.

Mineral oil, however, is not typically used for freezing protection in CPVC pipes. While it has some insulating properties, it does not effectively prevent freezing in the same way the other options do. Additionally, mineral oil may not mix well with water or other fluids commonly found in sprinkler systems, making it less practical as a freezing protection method. The other options serve a clear purpose in freezing prevention, making this distinction significant.