Propane Low Pressure Regulator with 1/4" female pipe thread (inlet) x 3/8" female pipe thread (outlet). Most commonly used on low pressure appliances that are 200, 000 BTU's or less. Low Pressure 11" W.C. setting. 1/2 PSI output. Low Pressure 11"" W.C. setting 1/2 PSI output | Mr. Heater Propane Low Pressure Regulator, F273767