The suction line is the larger of the two copper pipes that runs between the evaporator coil and the condenser unit of an air conditioner. The suction line carries low-pressure, low-temperature refrigerant gas from the evaporator coil to the compressor.
The suction line is typically insulated with a layer of foam or fiberglass insulation to prevent heat from being transferred between the refrigerant gas and the surrounding air. This helps to ensure that the refrigerant gas remains at a low temperature, which is necessary for it to absorb heat from the air inside the home.
The suction line is also connected to a suction accumulator, which is a device that helps to trap any liquid refrigerant that may be carried over from the evaporator coil. This helps to prevent the compressor from being damaged by liquid refrigerant.
