Lubrizol Advanced Materials Inc. offers FireFighter® GL Ready-to-Use by Noble Co., a glycerin-based antifreeze designed specifically for wet, stand-alone fire sprinkler systems. It has been tested and determined to be chemically compatible with BlazeMaster® CPVC fire sprinkler pipe. Use it in place of water and other water-like fluids where freezing may either damage or interfere with the functioning of the fire sprinkler system.