Couplings

A coupling assembly for forming a joint between a first secondary pipe section, a second secondary pipe section, and a third secondary pipe section, the coupling assembly accommodating a primary joint therein, in a secondary containment system, the coupling assembly comprising:

• a first coupling component having a first pipe-fit end, a second pipe-fit end, and a first joint end, the first coupling component having a first longitudinal axis between the first pipe-fit end and the first joint end, and a second longitudinal axis between the second pipe-fit end and the first joint end,
• the first pipe-fit end of the first coupling component including a first tubular portion having a first internal diameter sized and shaped to receive the first secondary pipe section, and a first sealer positioned such that the first pipe-fit end can be sealed in use to the first secondary pipe section;
• the second pipe-fit end of the first coupling component including a second tubular portion having a second internal diameter sized and shaped to receive the second secondary pipe section, and a second sealer positioned such that the second pipe-fit end can be sealed in use to the second secondary pipe section;
• and
• the first joint end of the first coupling component having a third internal diameter which is larger than the first internal diameter and the second internal diameter, and wherein the first joint end incorporates a first end face, wherein the first end face is in a plane that is at least one of substantially non-perpendicular to, and offset from, both the first longitudinal axis and the second longitudinal axis, and wherein the first joint end further includes a first mating region;
• and
• a second coupling component having a third pipe-fit end and a second joint end, the second coupling component having a third longitudinal axis arranged at an angle relative to at least one of the first longitudinal axis and the second longitudinal axis,
• the third pipe-fit end including a third tubular portion having a third internal diameter sized and shaped to form a sliding fit with the third secondary pipe section, and a third sealer positioned such that the third end can be sealed in use to the third secondary pipe section;
• and
• the second joint end of the second coupling component having a fourth internal diameter larger than the third internal diameter, and wherein the second joint end incorporates a second end face, wherein the second end face is in a plane that is at least one of substantially non-perpendicular to, and offset from, the third longitudinal axis, and wherein the second joint end further includes a second mating region sized and shaped to be sealed to the first mating region of the first coupling component.