www.pmmag.com/articles/89432-bradford-white-water-heaters-now-feature-safety-system
Bradford White Water Heaters Now Feature Safety System
January 14, 2006

Beginning Jan. 1, many Bradford White power-vented, through-the-wall water heaters will be manufactured with the Defender Safety System® to comply with new ANSI standards regarding flammable vapor ignition resistance. New features include a spark-to-pilot ignition system and an integrated immersion gas control valve with an LED indicator to assist in troubleshooting.