ANSI/ASSE (Plumbing) 1071-2008
Water mixing (also defined as tempering or blending) valves are used extensively in applications for emergency shower/eye and face wash systems to mix hot and cold water to provide tepid water. The term tepid has not been specifically defined, but is generally understood to mean lukewarm or moderately warm. Valves designed to meet this standard are intended to be used as a component that can provide tepid water for emergency eye wash and shower equipment that comply with the requirements of ANSI Standard Z358.1.