A service connection valve assembly, comprising: a generally cylindrical valve body and a generally cylindrical valve core; the generally cylindrical valve body has a first open end and a second open end, an interior surface defining a passageway extending along a longitudinal axis (A-A) from the first open end to the second open end, wherein the first open end is configured to be attached to the system or appliance that the valve assembly is to be used with, and a fluid is intended to flow from or into the second open end during a processing operation through the valve assembly, a valve seat within the generally cylindrical valve body through which the passageway extends, threads on a portion of the interior surface between the first open end and the second open end, and a circumferential detent groove, that an actuation tool used to actuate the valve core can latch onto, on an exterior surface of the generally cylindrical valve body between the first open end and the second open end; the generally cylindrical valve core is disposed within the passageway of the generally cylindrical valve body and is movable relative to the generally cylindrical valve body in a direction parallel to the longitudinal axis (A-A) between an open position where the generally cylindrical valve core is not engaged with the valve seat allowing fluid flow through the service connection valve assembly and a closed position where the generally cylindrical valve core is in sealing engagement with the valve seat preventing fluid flow through the service connection valve assembly; the generally cylindrical valve core includes an exterior surface with threads that are engaged with the threads on the portion of the interior surface when the generally cylindrical valve core is at the closed position; and a metal-to-metal seal between the valve seat and the generally cylindrical valve core when the generally cylindrical valve core is at the closed position; characterized in that: the interior surface includes an unthreaded section between the threads and the second open end; and wherein at the open position, the threads on the exterior surface of the generally cylindrical valve core are aligned with the unthreaded section so that the threads on the exterior surface are not engaged with the threads on the portion of the interior surface. a generally cylindrical valve body and a generally cylindrical valve core; the generally cylindrical valve body has a first open end and a second open end, an interior surface defining a passageway extending along a longitudinal axis (A-A) from the first open end to the second open end, wherein the first open end is configured to be attached to the system or appliance that the valve assembly is to be used with, and a fluid is intended to flow from or into the second open end during a processing operation through the valve assembly, a valve seat within the generally cylindrical valve body through which the passageway extends, threads on a portion of the interior surface between the first open end and the second open end, and a circumferential detent groove, that an actuation tool used to actuate the valve core can latch onto, on an exterior surface of the generally cylindrical valve body between the first open end and the second open end; the generally cylindrical valve core is disposed within the passageway of the generally cylindrical valve body and is movable relative to the generally cylindrical valve body in a direction parallel to the longitudinal axis (A-A) between an open position where the generally cylindrical valve core is not engaged with the valve seat allowing fluid flow through the service connection valve assembly and a closed position where the generally cylindrical valve core is in sealing engagement with the valve seat preventing fluid flow through the service connection valve assembly; the generally cylindrical valve core includes an exterior surface with threads that are engaged with the threads on the portion of the interior surface when the generally cylindrical valve core is at the closed position; and a metal-to-metal seal between the valve seat and the generally cylindrical valve core when the generally cylindrical valve core is at the closed position; characterized in that: the interior surface includes an unthreaded section between the threads and the second open end; and wherein at the open position, the threads on the exterior surface of the generally cylindrical valve core are aligned with the unthreaded section so that the threads on the exterior surface are not engaged with the threads on the portion of the interior surface.