Trouble with DuoTight system

[kyle.muramatsu]

I am excited to set up a keg in my fridge, but when I use duotight on the beer out I am getting all foam. When I hook up a tap directly to the standard ball connect, I get non-foamy beer (PSI is currently set a 8 psi). You can see this in the pictures below. I initially thought there could be a diameter jump from the line to the shank causing foam, I tried two different ways of connecting to the shank you can see below (ignore the cheap beer I am using for testing). Any suggestions?

Here are the parts list:
Torpedo keg
Duotight flow control ballconnect
EvaBarrier Tubing (8mm OD, 4mm ID)
Shank with DuoTight Connect
Perlick Faucet

Here is the alternate shank connects:
1/4" barb coupler
Duotight to 1/4"



View attachment duotight.jpg

 

[Wrendelar]

You’ve probably already checked this but have you adjusted the flow control on the ball lock duotight?

Others that that the length of tubing for counter pressure should be around 5-6 feet. Yours looks short

 

[Graham H]

Is the foaming consistent for multiple pours, or just the first one? Not saying that’s the issue; rather, it would be good to rule it out when isolating any faults.

 

[Brewin’&Qin’]

I was thinking the same as Wren, looks like the line is too short. At least from that picture angle.

 

[day_trippr]

If the line length was way too short I'd expect to see clear beer being shot out of the faucet.
What I'm seeing is something other than a line length problem - the beer is almost trickling out of the faucet and what little volume there is is full of gas.
I don't know anything about that beer QD but that would be the first thing I'd change out...

Cheers!

 

[marc1]

You've got flow control on both the QD and the faucet? Maybe too much. What happens is you open one of them all the way?

 

[Komodo]

Yeah, I'd keep the faucet wide open and adjust it at the QD.

 

[noahbanks]

Did you get this sorted out?

 

[fermented_drinker]

I was having this same issue, and a web search brought me here. I was getting 100% foam out of my system using a Duotight FC QD with an Intertap faucet in my keezer. I'm using 6' of EVA 8x4mm line. What ended up fixing the issue for me was completely taking apart the disconnect. A small flake of plastic came out that was lodged somewhere in the fitting. The other thing I noticed is that second o-ring made of silicone was pushed out of place and deformed in the fitting. This was causing the beer to pour out very slowly as well.

That silicone o-ring is so squishy that if you're putting a good amount of force on the beer line while trying to seat it, the first black o-ring is going to push and squeeze the silicone o-ring and cause it slip out of place.

I cleaned out everything, and I switched the silcone and black edpm o-ring in the fitting, so the hose passes through the silicone first. I'm guessing the reason they have the silicone o-ring on the inner position is because it's a more food safe material. Oh well. Now the beer is coming out much better. No foam after the first ounce or two and the flowrate is great.

 

[Bobby_M]

Flow control QD and flow control faucet combined is creating a hectic turbulent flow. Combine that with running the keg at too low a pressure, the Co2 is cracking out of solution. If you're going to use a flow control faucet, you need to eliminate the flow control QD. Raise the pressure to the chart; probably 10-12psi.