Must use an oil free air compressor. Between the gas and the air compressor machine entrance Phi 19mm, Phi 25mm galvanized steel or rubber tube connected with enough strength, not by the rusty pipe or water pipe connection. Air compressor must be installed in the ventilation, dry and dust free environment, otherwise the influence of air compressor and color selection effect. Air filter should be fixed in the easy to observe the water and convenient drainage. With plastic sleeves in the water at the bottom of the filter button, will discharge the water to the ground or container. Note: prior to the installation of gas storage tanks should be registered to the local authorities for the record.