Most standards now require that a(n) ____ be used if antifreeze or another nonpotable fluid is used to transfer heat in an indirect-fired water heater.

Question

Quizplus · Accepted Answer

A double-wall heat exchanger is necessary to prevent the nonpotable fluid, such as antifreeze, from coming into contact with the potable water supply. This is to ensure that drinking water is not contaminated by any chemicals from the heat transfer fluid. An anode rod is used to prevent corrosion in the tank, a dip tube is used to direct incoming cold water to the bottom of the tank, and tank insulation is used to reduce heat loss from the tank. None of these options directly address the issue of preventing nonpotable fluid from contaminating the potable water supply.

Most Standards Now Require That A(n) ____ Be Used If