API STD 1584
Four-Inch Hydrant System Components and Arrangements
|Publication Date:||1 January 1994|
This document establishes the standards for dimensions, coupling action, activation, and other requirements to achieve full interchangeability between components of various manufacturers of hydrant pit valves and couplers. This document also provides other optional features which component manufacturers should consider if they are to satisfy the full scope of users' requirements.
If complete interchangeability is to be attained, certain features of the mating components must be standardized. Other features, although desirable, are not so critical, but should be pointed out to assist manufacturers in the design of these components.
There are other components within the hydrant pit which are so closely associated with the hydrant valve and coupler that good design practice suggests these components and the hydrant valve and coupler be covered at the same time if the purpose and scope of this document are to be met.
Section 4 covers those features of the hydrant components which are mandatory as well as those which are optional. They will be listed as "Mandatory Items" and "Optional Items" respectively. Section 6 describes typical arrangements of the hydrant valve assembly components and their function.