U.S. Department of Energy Energy Efficiency & Renewable Energy U.S. Department of Energy Energy Efficiency & Renewable Energy

Plumbing (Domestic Hot Water) Systems

Proficiency Level 1: Remember

List the two primary purposes of plumbing and the three overall parts of a plumbing system.

Describe the difference between a building code, a building standard, and a plumber’s license.

Define key plumbing terms, including backflow, back siphonage, branch, building drain, drain, inceptor, potable water, septic tank, trap, vent stack, water flow controls, and water supply system.

Proficiency Level 2: Understand

Identify eight materials used for pipes in plumbing. For three of these materials, describe a positive attribute or use. For the other three materials, describe a negative attribute or why some local codes may prohibit this material for water supply piping.

Describe the key attributes of the four basic hot water delivery system types that are used in single- and multi-family homes.

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Proficiency Level 1: Remember

Proficiency Level 2: Understand