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I have Eva barrier tubing but I think its 3/16" so that would be slow filling 3 kegs
Not sure but they do a 4mm internal, 5mm internal and 6.3 mm internal.

Flow increases by the 4th power so if you double the radius the flow will increase by 16 times.

Hence fitting a bit of vinyl tubing on with 8mm internal would have 16 times the flow of the 4mm.

8mm fits nicely over the MFL, but i'd fit it over the barbed ball lock connector as the barb internal is a bit bigger than the MFL opening.
 
I'll be honest I've brewed for nearly 45 years and I'm sure that a pure oxigen free beer tastes better than mine but I keep getting people knocking at my door asking for more so I'm not too worried, thay keep saying I should open a brewey but at 60 plus years it's not on the radar
What I am saying with a manifold will allow you to transfer all three kegs at about the same rate as your transfer rate for the one. Duncb mentions the relationship about flow rate and diameter. Consider water flow in your house. If you have a 1/2" water line feeding two fixtures, turning them both on generally will reduce both their flows. Like you are in the shower and someone turns another hot on nearby. Instead, running a 3/4" line to a manifold with 1/2" lines allows more fixtures to be run at their max flow. Here, you start with 1/2" and step down a size of your choosing. Whether you decide to keep it closed to O2 ingress is your perogative. 3 bushings, 3 ptc adapters (careful on thread type), two 1/2" tees, a 13 ft length of Evabarrier, three Duotight QDs for the kegs, two 1/2" nipples, and the camlock. That'll fill about the same rate as the one keg. Save you about 40 minutes? Might be other ways to speed it up too.

So how about a floor plan! Door and window sizes and layout?
 
Does anyone know where to get a stainless adaptor using no hoses to go from screwing into the Quick Ball Lock to a ½” npt to replace this contraption.

This is basically for oxygen free transfer from my fermenter

View attachment 859096
241003.Solution.png

PN: AA-05371 $1.95
Adapter Stainless 1/4 in. FFL x 1/4 in. MPT

PN: AA-06764 $3.49
Bushing Stainless 1/4 in. FPT x 1/2 in. MPT

https://www.fhsteinbart.com
 
I get it! I just realized you're brewing bigger batch sizes. I don't often do 10 gallon batches but I do purge multiple kegs at once and it can be tedious. I usually do at least 4 at a time. What might speed things up there would be a manifold. Assume a 15 gallon batch. Bring your 1/2" line in to two tees in series. You'd have three outputs which would go to three kegs. They would fill up at the same time. You would need to reduce the line from 1/2" to flare, either like I said originally or go 1/2" reduced down to push to connect, 9.5mm is the biggest Evabarrier then some Evabarrier tubing to the Duotight 9.5 ball lock disconnects. The kegs will need a little space. Make sense? I do this with my jockey to clean the four lines at the same time. I have an extra tee.
I had to look for this sorry so late but this is what I created, not sure why I stopped using it

IMG_20241007_122528596_HDR~2.jpg
 
I had to look for this sorry so late but this is what I created, not sure why I stopped using it

View attachment 859461

The manifold as I described it was considering that you had reduced the line size. I am pretty sure if you keep the tubing the same size after a split that the vessel is will not drain any faster. (I don't know the physics to explain it.) In fact, slower because the added fittings increase friction. You may like the three way valve there but if you want it to drain the fastest, just one direct 1/2" line off the fermenter will do, and if the tubing will curve without kinking skip the elbow. Then just close the fermenter valve and move the hose. You are adding additional friction with the all the fittings, particularly tees and elbows. At the very least you could eliminate the second elbows by simply turning down the first ones after the valve.

Now when you reduced the tubing diameter that slowed things down. The manifold I described also has friction from the fittings, so not exactly able to do multiple streams as fast as a single line but most likely not a big deal vs the time savings. The 1/2" into a manifold has the capacity to handle a certain amount of flow. In a house, there comes a point where you will need a 3/4" line to feed multiple fixtures that are fed off of 1/2" line branching from the 3/4".

A transfer pump would speed things up on a 1/2" line if just gravity is still tedious with the line being fully 1/2" throughout.

So in regard to your brewshed, did you have any specific wants not shown? For instance, I have the same utility sink you do. I'd love to put in a three bay sink, mostly because I garden too and want to have a sink I can soak produce in, lettuce for instance. I probably can't find one the right size for the wall my sink is on an be able to fit my keggle in a single bowl. I also want the sink to have wings (drainboards). May be a unicorn but I keep looking for a used one! I may have to settle for a two bay. I don't like the single bay because I empty mop water in that sink and spray the mop out there. I'm always scrubbing it. A floor drain might be nice if you tiled the floor. Sometimes people want a seating area etc.
 
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The limiting factor to flow is the tube radius as stated earlier.
More valves, turns and non smooth surfaces will increase turbulence this will slow the flow.
now I remember why I put this in a box, if you open one end of any valve and turn the valve, it doesn’t slow down, it sprays water or beer causing probable oxygen issues
 
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