Plumbing Services Installation and Repair of Water Supply Systems - Water Mains and Branch Piping, Meters, Valves, Drains, and Storage Tanks Waste Systems - Sewers, Piping, and Vents Bathroom and Kitchen Fixtures and Appliances Gas Piping Troubleshooting Maintenance Correction of City Violations Heating Systems Installation and Repair of Hot Water Heating Plants - Boilers, Heat Exchangers and Coils High and Low Pressure Steam Heating Plants, Traps, Reducing Valves, and Expansion Joints All Types of Radiation Controls Emergency Shutdowns and Repairs Fire Suppression Systems Repair and Maintenance of Standpipe/Sprinkler Systems Roof Tanks, Pumps, Piping and Controls Mandatory Testing and Certification Backflow Prevention Installation of All Types of Backflow Prevention Devices Annual Certification and Testing Asbestos Handling Certified to Work in the Presence of Asbestos