Sick and tired of having to get under your vehicle to drain your tank? Or maybe you’re just building the ultimate system and want the best of the best. Either way, must-have upgrade to any train horn kit! Add these Drain Valve kit to a port and your good to go! Once installed, you’ll be able to drain the moisture in your tank at the touch of a button. Sounds like some chore to perform? Trust us, it's not. In fact, the air discharge from the valve has been known to turn heads by itself! You have to do it anyway, so why not make your life easier?