Reddit mentions of Ferroday Bs0159 Cornelius Keg Stainless Carbonation Cap with Liquid Ball Lock Disconnect Homebrew

I called all the local gas suppliers and in my area there are really only 2 vendors for food grade Nitrogen. I picked the cheapest and bought a 40 cu ft tank from them (Airgas). Hard to remember but maybe it was $140 full. They have them in stock typically and when I want more I swap out the tank for a full one for around $30 with fees.

I bought the cheapest nitrogen regulator I could find on Amazon at around $40. If I did it over again I'd find one with PSI readings between 0-60 psi and a pressure release. I typically use about 40-50 psi for cold brew since nitrogen will not readily dissolve like co2. I put the tank in the keezer for convenience but you don't have to like with co2.

I have an intertap faucet and swapped out the regular faucet for the stout one with the restrictor plate (this is what makes the nice cascade).

I brew a concentrate of 4 to 1 water to coffee by weight at room temperature for 12 - 20 hours, after which I strain the grounds through a mesh and put it in the fridge overnight. I have found that the difference between mediocre cold brew and exceptional cold brew (besides the bean and water quality) lies in the removal of superfine coffee particles. Either you buy a super expensive grinder with exceptional consistency or you have to filter with paper. I've tried all kinds of alternative filtering but paper is always the best. Leaving the concentrate in the fridge allows a lot of the superfines to gather at the bottom of your container, which helps in the simplify the filtering process. The next day I filter the concentrate through paper filters, careful not to shake it up too much. Then I transfer the concentrate to a keg adding a similar amount of water as concentrate (you'll have to experiment with ratios based on your beans).

I then hook up the nitrogen, crank up the pressure to a minimum of 40 psi and give it a few good shakes over the next few hours and then its good to go.

For small sharing with friends I bought a couple of these ( https://www.amazon.com/gp/aw/d/B013JX9COE?psc=1&ref=yo_pop_mb_pd) and I fill 20oz come bottles with cold brew from the keg and top off with nitrogen. These are great because you can hook either gas or liquid ball lock connectors to it. Then I just bring a portable version of the intertap stout faucets (kind of like this https://www.amazon.com/gp/aw/d/B01N9C2O1D?psc=1&ref=yo_pop_mb_pd) mounted on a ball lock connector.

(Edit: accidentally duplicated part of my comment)

I love having a refractometer http://www.ebay.com/itm/Beer-Brewing-Refractometer-0-32-Brix-Wort-Specific-Gravity-Juice-Wine-Sugar-Test-/252921300330?hash=item3ae348c56a:g:dZEAAOSw42JZDH3e

If you keg, being able to make your own sparkling water is cool https://www.amazon.com/Ferroday-Cornelius-Stainless-Carbonation-Disconnect/dp/B013JX9COE/ref=sr_1_1?ie=UTF8&qid=1494535378&sr=8-1&keywords=carbonation+cap

Fermcap is great.

I am blown away with how useful I find this https://www.amazon.com/gp/product/B000JCKCQQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1