Distribution System Any connection between a potable water system and another fluid system through which contamination could enter the potable water system. Tags: Backflow Prevention Devices, Certification Exam Prep, Cross-connection, Distribution System, Wastewater Treatment Read more articles Previous PostIron and Manganese Next PostLime Softening You Might Also Like How To Get Your Texas Class C Water System Operator License (part 2) June 15, 2018 Disenfection January 18, 2017 State Exam Information | California Treatment Operator Certification June 7, 2018 Post author: Post published:January 27, 2017 Post category:Certification Exams / Distribution / Water Treatment