US Patent 9574691 Hybrid push-to-connect fitting device, arrangement and method

A fitting body having an interior surface is provided with a tube stop extending radially inwardly thereof, and one or more nut connector assemblies provided as part of a packing arrangement comprising at least one sealing ring, a spacer gland and a fastening ring. The packing arrangement can further include a release pusher positioned on the radially inward side of the nut connector, wherein the release pusher is capable of axial insertion into the cavity of the head connector in order to lift teeth of the grip ring radially outwardly to permit insertion and removal of tubes to be connected via the center body.