BlazeMaster® CPVC Fire Sprinkler Systems offer superior hydraulics, high heat tolerances, corrosion resistance and ease of installation, especially in retrofit applications. The BlazeMaster CPVC system has passed a number of tests and expanded its listings to include use exposed in basements where the joists above are exposed, and for use as exposed vertical risers. The system is also approved for use with Tyco's combustible, concealed sprinklers (CC1& CC2) and Specific Application attic sprinkler heads. BlazeMaster.