API 1584 PDF
Establishes the standards for dimensions, coupling action, activation, and other requirements to achieve full interchangeability between components of hydrant pit valves and couplers.
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Four-Inch Hydrant System Components and Arrangements
American Petroleum Institute , 12/01/1994
API 1584 PDF
Establishes the standards for dimensions, coupling action, activation, and other requirements to achieve full interchangeability between components of hydrant pit valves and couplers.