The JonesValve is the easiest and most efficient way to clear condensate drain lines.
After installing the valve, attach the gauge hose, rotate handle so the arrow points toward the coil and apply pressure from a compressed air supply.
When drain clears, rotate handle 180 degrees and apply pressure until \"drain line to waste\" clears.
Rotate handle 90 degrees so it is pointing away from the brass fitting. Remove hose.