The A/C liquid line (1) is the refrigerant line that carries refrigerant from the A/C condenser to the A/C evaporator. The A/C liquid line contains the high side service port (2) and is secured to the A/C expansion valve by a tapping block (3) and to the A/C condenser by a metal fitting (6).The A/C liquid line is sealed to the A/C condenser and the A/C expansion valve by use of rubber O-ring seals (4) and a metal gasket (7). 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 liquid line has no serviceable parts except for the O-ring seals, gaskets, high-side service port valve and cap. The O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refrigerant. The O-ring seals and gaskets must be replaced whenever the A/C liquid line is removed.The A/C liquid line cannot be repaired and must be replaced if found to be leaking or damaged.