SERVICES TO BE PROVIDED Group 1: Wet Agent Systems: This group may lay out, fabricate, install, inspect, alter, repair, and service water sprinkler systems, water spray systems, foam-water sprinkler systems, foam-water spray systems, standpipes, combination standpipes and sprinkler risers, all piping that is an integral part of the system, sprinkler tank heaters, air lines, thermal systems used in connection with sprinklers, and tanks and pumps connected thereto, excluding pre-engineered systems.. Group 2: Dry Agent Systems This group may fabricate, install, inspect, alter, repair, and service carbon dioxide systems, foam extinguishing systems, dry chemical systems, and Halon and other chemical systems, excluding preengineered systems. Group 3: Pre-Engineered Systems This group may service, repair, recharge, hydrotest, install, or inspect all types of pre-engineered fire extinguishing systems.