Picture of 5L Mini Keg Tap
I have sitting on my counter the Krups Beertender I converted (http://www.instructables.com/id/Krups-Beerteender-Conversion/), but for the Superbowl I realized how non-portable this solution was. So I set out to find a easy and cheap portable tap that I could use from a cooler, counter top, or fridge.

After looking online, I found this: http://forum.northernbrewer.com/viewtopic.php?f=3&t=61167&sid=f054f78a221afd9740f0c31521c11bc4 , which really helped me with the basics and why not to use brass/copper. His design is pretty great, but I think I have been able to simplify and make it cheaper.
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Step 1: Gather needed materials

Picture of Gather needed materials
I ran down to the local big box building store to pick this up:
2 1/2" threaded to 1/4" push to connect
1 1/4" to 1/4" push to connect
1 1/2" threaded to 1/2" barbed fitting
1 1/2" Brass Tee
Some 1/4" Ice maker tubing
1' Length of vinyl tubing (not pictured)
Teflon Tape

I think I spent just around $25 on parts (if that much).

You are a going to need a drill, 1/4" bit and an adjustable wrench

Step 2: Drill out one of the 1/2" threaded to 1/4" push to connect

Picture of Drill out one of the 1/2
Since I was not able to figure out how to take these totally apart, some very careful drilling is in order.

Flip it, so the threads are facing up and look for the hole on the inside, you need to open that hole to 1/4 inch. Its at maybe an 1/8" or 3/16".

Keep in mind there is an o-ring in there that has to stay intact.

If you do this right, you can now pass the 1/4" tubing through there and maintain an airtight seal. 
dbtfree8 months ago

How much pressure do you think this will withstand to pressurize if you wanted to FC soda or beer? The recipe I am looking at is saying go up to 80 PSI but wondering if it will hold that.

80 psi doesn't sound right. I think you'd have a beer foam gun if you served at 80 psi. I haven't really seen any recommendations over about 30 psi myself and that is still quite high.

At what point does the gas enter the keg? I see it goes into the T, but don't understand how the gas pushes the beer up through the dip tube?
cdburkhart (author)  nick.nittoli.79 months ago
Its kind of hard for me to explain without a picture.

The gas enters the keg throught the nylon T at the very top, creating pressure in the entire system which then pushes the beer throught the dip tube.
cdburkhart (author) 1 year ago
The friction of the barb in the bung creates a very good seal. I took my regulator up to 50 psi overnight and it held.
jstraightj1 year ago
Ok, I will try it myself. How tall does the whole thing extend above the keg? To keep hight to a minimum could 1/4 or 3/8 tee be used with appropriate fittings?

cdburkhart (author)  jstraightj1 year ago
This one is around 2 1/4" to 2 1/2" off the keg. You could try, however when I was working on it, I kept getting kinks in the tube with smaller tees.
Thanks for the response, just one last question. What keeps the tap in the keg, does not pressure force it out?