These requirements cover automatic drain valves that are intended to drain water from cavities in standpipe systems intended usually to be empty, such as those between a hose valve and hose rack, pipe sections between fire department connections and check valves, and the like. The valves covered by these requirements are intended for installation and use in accordance with the standards for the Installation of Sprinkler Systems, ANSI/NFPA 13, and Standpipe and Hose Systems, ANSI/NFPA 14.
UL 1726 BULLETIN-2007 history
2007UL 1726 BULLETIN-2007 UL Standard for Safety Automatic Drain Valves for Standpipe Systems
2001UL 1726-2001 UL Standard for Safety Automatic Drain Valves for Standpipe Systems Third Edition
1993UL 1726-1993 Automatic drain valves for standpipe systems