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After breaking my hands trying to use a manual vacuum pump to bleed brakes, I went to the dollar store for a fix, lol.
Came across a "blackhead sucker type thing" small handheld cosmetic vacuum for $5...
A t fitting later and have the electric vacuum pump (that holds 20psi?!) and the manual pump hooked up just for the pressure gauge. *its the white thing at bottom of pic; even came with chrome pink accents, lol
Zero pumps manually, electric pump does it all! (can speed up and get 5psi going with manual pump)
Could probably be used without catch can or gauge without issue as long as no brake fluid touches pump intake.
*bonus hack it will suck out your blackheads at 20psi, lol.