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 State Certification Information | California Treatment Certification Renewal June 19, 2018 Public Water Systems January 16, 2017 Work and Holidays December 7, 2015 Post author: Post published:January 27, 2017 Post category:Certification Exams / Distribution / Water Treatment