After refrigerant lines have been installed they should be evacuated to a(n) moderate vacuum.
Refrigerant lines are insulated copper wires that transport refrigerant between outdoor and indoor air conditioning or heat pump units. One line carries gaseous refrigerant and the other carries liquid refrigerant. It is an important part of the cooling system as it allows the condenser and coils to move and heat away from your home.
If you upgrade or replace your air conditioner or heat pump, you will need to replace the refrigerant lines. Do not attempt to reuse old refrigerant lines as the line sealant can wear out over time. When this happens, moisture can get in and mix with the coolant, causing damage to the internals of the system.
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