Dover - Manuf. & Operations [Manufacturing Technician / Production Associate] As a Piper at Dover, you'll: Install and repair refrigeration piping and components; Measure, cut, bend, assemble and install copper and steel tubing; Use Torch to apply solder; Operate copper saw, tube bender, T-Drill, etc; Install refrigeration valves, tubing, fastening in place; Use tools such as tube cutters, hand vise, power benders, etc...Hiring Immediately >>