The A/C suction line (1) is the refrigerant line that carries refrigerant from the A/C evaporator to the A/C compressor. The A/C suction line contains the low side service port (2) and is secured to the A/C expansion valve by use of a tapping block (3) and to the A/C compressor by a metal fitting (5). The tapping block portion of the A/C suction also secures the A/C liquid line (7) to the A/C expansion valve.The A/C suction line is sealed to the A/C expansion valve and A/C compressor by use of rubber O-ring seals (4) and a metal gasket (6). The O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refrigerant.Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.The A/C suction line can be serviced separately from the A/C liquid line and has no replaceable parts except for the O-ring seals, gaskets, low side service port valve and cap. The O-ring seals and gaskets must be replaced whenever the A/C suction line is removed.The A/C suction line cannot be repaired and must be replaced if found to be leaking or damaged.