A system including a quick connect fluid coupling and a tubular fluid conduit, the quick connect fluid coupling comprising: a coupling body having a fluid conduit inlet, a fluid outlet, and a throughbore extending from the inlet to the outlet, means for sealingly receiving the tubular fluid conduit through said conduit inlet, and means to lock in place the fully inserted tubular fluid conduit by co-acting with an external radial formation of the conduit; a check valve axially displaceably mounted in said throughbore adjacent said outlet, a bias spring operatively disposed between the coupling body and said check valve to urge the check valve toward a first, closed position seated against said fluid outlet for preventing fluid flow through said outlet, said check valve further having an interior end and an exterior end opposite to each other, the interior end being adapted to be contacted by the tubular fluid conduit to work against said bias spring to displace said check valve, the axial lengths of said check valve and said tubular fluid conduit being such that the tubular fluid conduit, when fully inserted, displaces the check valve to a second, unseated position to allow fluid flow from said tubular fluid conduit around said check valve and through said outlet; whereby removal of the tubular fluid conduit from the coupling body allows the bias spring to return the check valve to the first, closed position preventing fluid flow through the coupling, characterised in that said means to lock a tubular conduit to the coupling body includes a circumferential groove formed on the coupling body proximate said fluid outlet and a resilient clip mounted in said groove; and said check valve includes four large flow-through openings defined by ribs. a coupling body having a fluid conduit inlet, a fluid outlet, and a throughbore extending from the inlet to the outlet, means for sealingly receiving the tubular fluid conduit through said conduit inlet, and means to lock in place the fully inserted tubular fluid conduit by co-acting with an external radial formation of the conduit; a check valve axially displaceably mounted in said throughbore adjacent said outlet, a bias spring operatively disposed between the coupling body and said check valve to urge the check valve toward a first, closed position seated against said fluid outlet for preventing fluid flow through said outlet, said check valve further having an interior end and an exterior end opposite to each other, the interior end being adapted to be contacted by the tubular fluid conduit to work against said bias spring to displace said check valve, the axial lengths of said check valve and said tubular fluid conduit being such that the tubular fluid conduit, when fully inserted, displaces the check valve to a second, unseated position to allow fluid flow from said tubular fluid conduit around said check valve and through said outlet; whereby removal of the tubular fluid conduit from the coupling body allows the bias spring to return the check valve to the first, closed position preventing fluid flow through the coupling, characterised in that said means to lock a tubular conduit to the coupling body includes a circumferential groove formed on the coupling body proximate said fluid outlet and a resilient clip mounted in said groove; and said check valve includes four large flow-through openings defined by ribs.