enum SystemType { Undefined = 0, SupplyAir = 1, ReturnAir = 2, ExhaustAir = 3, OtherAir = 4, DataCircuit = 5, PowerCircuit = 6, SupplyHydronic = 7, ReturnHydronic = 8, Telephone = 9, Security = 10, FireAlarm = 11, NurseCall = 12, Controls = 13, Communication = 14, CondensateDrain = 15, Sanitary = 16, Vent = 17, Storm = 18, DomesticHotWater = 19, DomesticColdWater = 20, Recirculation = 21, OtherPipe = 22, FireProtectWet = 23, FireProtectDry = 24, FireProtectPreaction = 25, FireProtectOther = 26, SwitchTopology = 27, Fitting = 28, Global = 29, PowerBalanced = 30, PowerUnBalanced = 31, CableTrayConduit = 32 };