Pressure bleeding

[Eyvind Spangen]

I made a pressure bleeder today by using an old reservoir cap and
attaching a hose to it. I made it to change brake fluid in my '90 V8
(no clutch). Now to the question: Do I have to keep the brake pedal
depressed to allow fluid flow from the reservoir to the lines &
calipers, or can I just attach the bleeder and start bleeding, just
watching the reservoir? I've bled brakes the "old" way a million times
before, but never with a pressure bleeder..

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Regards,
ES