I use those connectors to clean a 5-tap keezer. I daisy-chain them using 1/2" silicone tubing fit over the spouts. It works remarkably well.
Starting w/ the tap on the right, the Liquid QD for that tap connects to the pump; the cleaning solution runs into that, out the tap, where it then moves to tap 2; the liquid QDs for taps 2 and 3 are connected w/ Bobby's device.
Then the spouts for taps 3 and 4 are connected with silicone tubing, while the liquid QDs for taps 4 and 5 are connected with Bobby's device.
Finally a longer piece of silicone tubing drains from spout 5 back into the bucket.
I've since found I get better flow if I put the bucket on a chair or crate, but given all the resistance present in all these thin ID lines, it's amazing that it works.
I typically do a solution of BLC and set it in motion; I'll drain off the beer that is displaced into a small bucket, and when the solution flows clear I'll then return that to the bucket for recycling through the system. I let the system do its thing for 20-30 minutes, then flush with water (draining about 1/2 gallon off into a bucket again), then I'll add a little star-san just because.
PS: I've found it doesn't work so well if the tap handles are pushed back.
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