Kerbal Space Program 1.9 - Getting To Orbit Using Drain Valves?????

Kerbal Space Program 1.9 is another Minor Update to the game which includes a number of enhancements, Graphical updates, model changes and some really useful changes for Helicopter design.
However it also includes a valve that lets you dump fuel, and I thought I've try to figure out how to use this for good!
This will probably be fixed in 1.9.1

Valves?????