Subchapter PHS.4.4 General Fire Safety PHS.4.4.010 Open Flames. PHS.4.4.020 Cooking Equipment . PHS.4.4.030 Fire service elevator keys. PHS.4.4.040 Portable unvented heaters. PHS.4.4.050 Inspection, testing and maintenance of cross connection control devices. PHS.4.4.060 Credentials for testers of fire sprinkler systems. PHS.4.4.070 Maintenance of smoke detectors and alarms. PHS.4.4.080 Manual wet sprinkler systems. PHS.4.4.090 Hose Threads.