McMaster 4394K62 Float-Operated Compressed Air Drain Valves High-Discharge, 1 NPT x 1/16 NPT Female

With a discharge capacity of more than four gallons per minute, these drain valves can handle large compressed air systems. Also known as drip legs, these drain valves have a float that automatically opens the drain when the bowl begins to fill. Install them at low points in your line after separators, dryers, filters, and aftercoolers. Drains can be serviced without removing them from your air line.