I have this item (purchased elsewhere) and I too was disappointed at first to discover that it does not allow flow control taps to fully function. Once receiving and cleaning the machine oil from my Intertap flow controls from MoreBeer!, I set about attaching them to my beverage out ball lock QDs, and found my flow control levers' motion was getting stopped. It is a clearance problem, and there are two work-arounds:One is to add one more faucet mount o-ring to the back of the flow control tap. Doing this on two of mine did the trick. Having o-rings makes me nervous, so I'll keep a close eye on the fridge.The other work-around is to find an adapter that has a deeper recess machined out that allows the plunger at the rear of the FC faucet to function. I know these adapters exist, since I have one that I got through blind luck from another vendor.**Note to MoreBeer!: if these more deeply-recessed adapters were available, I for one would purchase at least two, and they would be a great recommendation for customers wishing to use their Intertap FCs in this manner.