A simple but essential part, the drain cock (or valve) threads into your tank(s) and allows you to drain the tank(s) of water and moisture. Most are 1/8” or 1/4” male NPT and have either a knurled-style knob or wing nut to open/close the valve. Since most are brass or steel, they will rust over time and should be replaced as soon as they start to leak. Be sure to drain the tank after every extended use, as it can save your expensive tank from developing leaks.
15-pc Thunderbolt Black Oxide Drill Bit Set
1/4" x 50 Ft Noodle Air Hose with Coupler and Plug