Pressure gondola (1) includes hollow body (2,3) and middle flexible film (6) for haemodialysis medical lines, which defines a gas chambers (7), with liquid chamber (8) and entrance and exit tubulose accessory (10,11), for being connected to the medical line of haemodialysis. Female luer lock connectors (12) include that tubular body (13) by the material and inner tubular body (14) of relative stiffness axially traps rotation connection by the thermoplastic material tubular body (13) of flexible relative, are associated at least one tubular fitting (11). Tubular fitting (11) is bonded on the female connector (12) of the inner and outer tubular body (13,14) formed between annular chamber (22).
