The scope of this Standard is the development of standards for hydrants including nonfreeze wall, ground, post, and floor types and moderate climate wall and floor types, which are used in buildings and grounds as water supply terminals, employed principally for lawn and flower bed watering hoses and normal building maintenance functions. This Standard covers definitions, connections, materials, variations, testing and operation, and general requirements for the hydrant types included in the scope. The purpose of this Standard is to supply plumbing code authorities and others with full knowledge of the minimum design and quality criteria for hydrants necessary for sound performance and safe and sanitary installations. It is not intended as a specification guide. NOTES: (1) Figures used in this Standard are intended to describe and portray typical hydrants and are intended to restrict design or be used for specification purposes. (2) All hydrant installations shall be in conformance with local codes, with protection against flow and contamination provided. See para. 5.2 for information on vacuum breakers.
ASME A112.21.3M-1985 history
0000 ASME A112.21.3M-1985(R2022)
0000 ASME A112.21.3M-1985(R2017)
1985ASME A112.21.3M-1985 Hydrants for Utility and Maintenance Use Revision of ANSI A112.21.3-1976