This is exactly how to bench bleed a brake master cylinder. Purging your brake master cylinder is a vital step to installing any master cylinder on any automobile. If you don't follow these steps it is very likely that your brakes will not function when you put everything back together.
If your vehicle is equipped with ABS you might need to do an ABS purge on top of this which I will be doing a video on that very soon.
Kit: https://amzn.to/3k3M06U
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*Disclaimer: Please use all safety precautions