A universal coupling assembly is provided including a housing having an inner bore that extends along an axis through a fluid port and a flange formed integral with the housing and the inner bore. The flange extends radially outward from the axis and has a mating surface. A nipple extends from the flange along the axis toward the fluid port. The nipple has a mating interface at an end thereof, and the nipple has a junction portion extending at least partially about the nipple and located between the mating interface and the flange. The junction portion and the mating interface are configured to receive at least two different types of interchangeable fittings based on a type of mating joint, and the junction portion is matable with one of a flange fitting, a threaded union fitting, a sweat fitting, an NPT fitting, and a barb fitting.