How to pressure-bleed the brakes on a B-van?

A friend uses a coleman stove pressure tank. Fills with brake fluid and pumps it up. Made some kind of adapter to connect to bleeder. He pushes fluid from cylinders back to master cylinder. Zero air in system.
A thumb pump oil can will work a few times like this also with a piece of 1/4 inch clear vinyl tubing and using teflon tape or paste on the outside half of the brake bleeder threads. I almost always push bleed, it works wonder on a complete brake system rebuild, usually don't even have to bench bleed the master cylinder, saves brake fluid as well.