A modular potable water distribution manifold for an aircraft water supply and drainage system includes a tubular element with a first manifold quick connector adapted to mate with a flexible hose connector and having a flow control poppet, a second manifold quick connector having a flow control poppet, the second manifold quick connector adapted mate with a terminating self-venting/self-draining device, and a rotating ferrule that mates the second manifold with the self-venting/self-draining device.