Individuals understand how to disinfect, filter and soften water supply systems. They can troubleshoot water supply problems, flush out visible contaminants from a plumbing system and disinfect a potable water plumbing system. They are familiar with chlorinators, pasteurization systems and ultraviolet-light systems. They know how to solve water quality problems such as hardness, discoloration, acidity, turbidity, and foul odors and flavors. They are able to install a reverse-osmosis system.

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