The NukaTap FC is the worlds only forward sealing flow control tap that can use a auto close spring.  By inserting the spring between the flow control device and NukaTap shuttle the tap to automatically close when you let go of the handle.

This is perfect for customers who may not be diligent enough to remember to completely turn off the tap after each pour. Or for those with little kids or pesky cats that knock everything around!

This very inexpensive spring can save you from emptying an entire keg and then loosing a whole bottle of gas.