enum PipeSystemType { Undefined = 0, SupplyHydronic = 7, ReturnHydronic = 8, Sanitary = 16, Vent = 17, DomesticHotWater = 19, DomesticColdWater = 20, OtherPipe = 22, FireProtectWet = 23, FireProtectDry = 24, FireProtectPreaction = 25, FireProtectOther = 26, Fitting = 28, Global = 29 };