Apparatus, system and method for filling a beverage container

An apparatus for filling a keg with liquid, the keg comprising a valve that seals the keg and a locking recess to receive the apparatus, the apparatus comprising:

• an upper hollow body having a top opening and a bottom opening and tapering from the top opening to the bottom opening, the top opening enabling a liquid to be poured into the top opening and subsequently flow downward, by gravity, to exit the bottom opening;
• a movable piston extending through the upper hollow body and into a lower portion of the apparatus, the movable piston being movable between a first position wherein a liquid pathway though the apparatus is closed and a second position wherein the liquid pathway through the apparatus is open, the movable piston being further configured to depress a ball valve portion of the valve to allow for liquid flow through the upper hollow body into the keg through a channel located proximate a lower extremity of the movable piston;
• the lower portion, fixedly joined to the upper hollow body, comprising a coupling ring, a flange, and a probe assembly;
• the coupling ring configured to engage with the locking recess on the keg;
• and the probe assembly configured to engage with the valve when the coupling ring is engaged and comprising a first portion to depress a ring valve portion of the valve, wherein depressing the ring valve allows for venting of gas from the keg.