Protect personnel & equipment from the dangers of a flashback. Conform to Australian standard AS4603 and independantly certified by Apragaz laboratory in Belgium, Europe. For peace of mind, every flashback arrestor is flame, flow & leak tested after manufacture. Designed and manufactured by a team with over 35 years experience in gas equipment engineering. - Conform to AS4603-1999 & EN730 - Thermal cut-off valve for protection against sustained flashback (regulator mount models)