We are currently installing Delta Valves. The feed line goes into the Drum about 1½’above the slide valve blade. It seems to me that this area would allow for a solid base of coke that may uphold the Drum while opening the Delta Valve. If the Drum has not adequately drained and is full of water, the thought was that we could partially open the Delta Valve and perhaps use the Delta Valve as the drain valve. I am concerned now that this may not work very well due to the solid base of coke. This solid base may uphold the Drum full of water long enough for the valve to open and then let loose all at once. Has anyone experienced this?