I just received my mini keg I designed and made from my TIG welding friend. It should hold about 17 -18 beers (341 ml each). I pressure tested it with 12 psi CO2 and water and all is good. Now to get my beer inside for a foam test at the tap end. I put shut off clamps on each end in case something goes wrong and plan on using the bike tire CO2 system and a tire gauge to monitor pressures.Quick disconnects allow flexibility for easy swapping out of parts during test phase! They also let me take lines apart and dry them out with air if needed!