C3 Gravity Bleed
If you recently purchased the car, and are going to be doing some basic maintenance, then replacing all 4 rubber break lines to the calipers would be a good idea. You can go OEM rubber again, or with the braided steel hoses.
The OEM rubber lines should be available at your local auto parts store. You might want to replace all the bleeder valves as they may have some contamination in them stopping them from bleeding efficiently.
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