UL Standards & Engagement Hydrants for Fire-Protection Service UL 246

1.1 These requirements cover the performance of and methods for testing hydrants intended for use in piping systems supplying water for fire-protection service. 1.2 Hydrant types covered by this standard include: a) Base valve design and b) Wet barrel design. 1.2A Traffic model hydrants of both the base valve and wet barrel design may be covered by this Standard. However, these requirements are not intended to cover the performance of and methods for testing break features of traffic model hydrants. 1.3 Requirements for the installation and use of hydrants covered by these requirements include, among others, the Standard for the Installation of Private Fire Service Mains, NFPA 24. 1.4 A product that contains features, characteristics, materials, or systems new or different from those in use when the standard was developed, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as determined by the intent of this standard.