This combination orifice and control valve is designed for our BURN10 10" Cast Iron Burner to burn LPG propane 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 regulator that supplies LPG propane at 11" WC. Fits other Banjo/Hurricane type burners and allows them to operate at low pressure 11" WC LPG.

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.