This combination orifice and control valve is designed for our BURN10 10" Cast Iron Burner to burn Natural Gas at 11" WC. It has a 1/4"MPT thread on the orifice side and a 3/8" male flare on the inlet side. It is not a regulator and must be used with a regulated gas supply at 11" WC. Fits other Banjo/Hurricane type burners and allows them to operate at low pressure 11" WC Natural Gas.

What is WC Pressure?  WC stands for Water Column and is measured in inches.  It is a measurement of pressure under 1 PSI.  Most gas companies deliver gas to your home at 7" to 11" WC.  27.7" WC is equal to 1 PSI.