Quantity of (2): Worthington 331891 2 Stage Propane Regulators for 100 lb Propane (LP) Tanks. Manages Propane Fuel Flow Transfer For 100 LB Propane Tanks This 2 stage liquid propane (LP) regulator from Worthington Cylinder is ideal where there are short distances between a tank and appliance. The 2 stage regulator manages fuel transfer by combining a high pressure 1st stage regulator and a 2nd stage low pressure regulator into one device, which is more efficient than installing two separate regulators.