Breadcrumb Home/ The Leading Edge of Maintenance | HVAC - Sweating/ The Leading Edge of Maintenance | HVAC - Sweating The Leading Edge of Maintenance | HVAC - Sweating Duration 0 hours 2 minutes Language English Covers brazing techniques for HVAC copper tubing, including bridging holes with silver solder and connecting mismatched pipe sizes by pinching and soldering. Back to Course Title The Leading Edge of Maintenance | HVAC - Sweating