Water Supply Chapter 8

Heating potable water for domestic purposes such as bathing and cleaning is a relatively new practice.

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Convection is heat transfer that occurs when currents circulate between the warm and cool regions of a fluid.

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To protect a building water supply system from the effects of thermal expansion in a closed piping system, an expansion tank should be installed on the cold water supply side of the water heater ahead of any circulation line connections.

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An internal heat exchanger has only one wall that separates two liquids.

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A water heater is a plumbing appliance heat source that incorporates limiting controls for heating water up to 300°F (149°C).

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Commercial and industrial units typically operate between 208 V and 440 V.

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Only high-input commercial heaters utilize a multiple-flue construction design.

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A passive system does not require a pump to circulate heat transfer fluid.

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A pressure-reducing valve normally is set to activate when pressures within a tank exceed 100 psi (689.5 kPa).

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Protection against vacuum conditions within a water heater is required by both model plumbing codes.

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• False