How to connect Natura Machine to Bulk CO2 To Bulk CO2 Tank Client must furnish a dedicated CO2 line from the bulk Co2 tank that has at least 100 psi of pressure and a ½” male fitting on the end of the line. Client will run this tubing and provide fitting Natura will supply regulator. Natura technician will run tubing from the regulator to the Natura machine. Regulator must be within 3 feet of Natura machine. Natura Tech will run this tubing