White Rodgers natural gas valve, for water heater #'s 6 30 yort/s, 6 40 yort/s, & 6 50 yort series, not for use on 6 30 gort/s 200 & 300, 6 40 gort/s 200 & 300 or 6 50 gort 200 & 300 series heaters built between 2003 & 2008 only, no wire leads on gas valve.