Oh I see,
When I bleed brake fluid, this is what I do...
1. Syringe to suck old brake fluid out.
There will be a tiny bit remaining below the mesh, no big deal.
Add new fluid.
2. Then use air compressor to bleed (compressor set at 10 psi).
About 10 years ago, I made an ATE cap just for bleeding.
Detail below.
DIY: 1-man Hydraulic Bleeding Kit for those with Air Compressor!
https://www.bimmerfest.com/forums/sh...d.php?t=392957