I've got a vaccum bleeder that hooks ups to the air compressor. I think it's made by "Four Uncles". I only use it to flush a system quick. When it's time to bleed air out, I use the two person method.
The vaccum function seems to pull air in through the bleeder valve threads, so the bubbles never really stop. Some people say to put grease around the valve to block the air but the chance of grease getting in the system makes me uncomfortable.
The vaccum function seems to pull air in through the bleeder valve threads, so the bubbles never really stop. Some people say to put grease around the valve to block the air but the chance of grease getting in the system makes me uncomfortable.