Alaska Distribution: Level 1-2 Cross-Connection Control & Water Quality Maintenance
Between the entry-level system-fundamentals overview and the advanced hydraulics/math material sits the core day-to-day work of a Level 1/2 distribution operator: preventing contamination through cross-connection control and keeping water quality stable inside the pipe network.
Cross-Connection Control
A cross-connection is any actual or potential link between the potable system and a source of contamination. Know the backflow-prevention hierarchy by hazard degree: air gaps (highest protection), reduced pressure zone (RPZ) assemblies for high-hazard connections (e.g. fire sprinkler systems with chemical additives, boiler feeds), double check valve assemblies for lower-hazard connections, and vacuum breakers (atmospheric and pressure-type) for individual outlets. Understand backpressure (downstream