An apparatus, method, and program product are disclosed for inviting devices to join a mesh network. In addition, the method comprises decoupling the first vessel from the plurality of top-tensioned risers after. The distributors with tips more deeply positioned in the riser will penetrate a dense catalyst column we discovered generates in risers of larger diameter over 1. The second prevents overpressurization in the brew paths by routing excess pressurized water from the respective brew path back through the second solenoid and out a drain line leading to a drain, where the path to the drain is not part of the brew path. Once the key value is outside of the subgroup, it is not possible to return it to the subgroup.