3-Position Dial for fast switching and precise control The nitrogen purge tool and nitrogen regulator purge tool use a 3-position dial to quickly switch between purging, brazing, and shut-off. This gives precise control of nitrogen flow for each stage of HVAC work. 1/4-Inch Port for easy connection A 1/4-inch port attaches quickly to the outlet of a standard nitrogen pressure regulator. When the purge tool is set to off, a standard 1/4-inch refrigerating fluid hose can be connected, allowing flushing and brazing to be completed in seconds and streamlining workflows. Effective debris and oxidation prevention During purging and brazing, the tool directs nitrogen into the line to remove refrigerants and debris, helping prevent oxidation and potential equipment failure. Stable and accurate pressure control With an inlet pressure of 50 psi and a maximum of 200 psi, this tool provides accurate control over nitrogen flow, yielding stable purging and brazing with reduced gas waste and improved work quality. Applications and compatibility Designed for HVAC purging, brazing, and line flushing tasks, it is compatible with standard nitrogen regulators and hoses to fit your existing setup. Use scenarios - Purge and braze HVAC system lines to prevent oxidation and contamination. - Flush lines before service to remove refrigerants and debris. - Switch between purge, brazing, and shut-off during installation or maintenance for efficient workflow.