WIF Plug (provisions to add your own drain valve)
http://www.kennedydiesel.com/images/wifplugdmax2348.JPG
WIF Plug with drain
http://www.kennedydiesel.com/images/...xdrain2350.JPG
Bleed screw (red so it's easy for wife/novice to find in an emergency)
http://www.kennedydiesel.com/images/...dscrewdmax.JPG