The air above the fluid in the purpose-made pressure bleeder is exactly my concern. That's why Motive made it small, I think.
To the OP: Yes, you pump once and bleed consecutively, and normally there's no need to pump again. If the flow reduces past your patience threshold, check the pressure gauge and give it another pump or two.
The cost of the Motive is about one oil change or set of brake pads, and definitely not a reason to buy a garden sprayer, hope it is glycol compatible, add a pressure gauge and hose-to-cap accessory. Even for a cheap DIYer like me. And the garden sprayer, even the little 1-gal models are way too big; too much air.
Back to Phil: You should consider a nitrogen bottle to power yours. You probably already have one for your HVAC adventures, complete with regulator. One for each residence, right? Just teasing. But at least you could know you did everything to keep moisture from getting near the surface of your new brake fluid!

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Art Benstein near Baltimore
Crusin' and playin' the radio... With no particular place to go.
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