RCW 19.27A.060
Findings-1983 c 178: "The legislature recognizes that unnecessarily hot tap or bath water creates an extreme risk of severe burns, especially among the elderly, children, and retarded persons. Annually, numerous persons suffer severe scald burns, some resulting in death, from tap or bath water which is inordinately hot. Excessive tap and bath water temperatures in residential usage is unnecessary for sanitary purposes. Regulation of the setting of water temperatures upon installation can virtually eliminate incidences of dangerous scalding. Further, the legislature finds that projected future shortages of energy in our state could be reduced or prevented by the efficient utilization of existing energy resources. Reducing the temperature settings on thermostats to one hundred twenty degrees Fahrenheit (or forty-nine degrees Celsius) would save energy that is now unnecessarily consumed, reduce homeowners' average utility costs, and promote home safety without any loss of comfort or health." [ 1983 c 178 s 1.]