AutoFlush Valve with CordMr. Steam AutoFlush Valve with Cord The optional AutoFlush System feature automatically drains the MrSteam system following each use. A time delay allows the water to cool down (about two hours) before it drains by gravity for a safe and gentle operation. Note: If the Express Steam option has been installed, the AutoFlush will drain for ten minutes then refill with fresh water to begin the pre heat cycle. The system quietly flushes impurities through