Yes if you build a 2 bucket system do exactly that and don't need the anti siphon set up. And I completely agree I'm not sure how'd you'd get an even feed to all the drop emitters with such low pressure.Lol u wont lose pressure because that pressure comes from the pump! And the double bucket gravity dealywhopper i am assuming u set lower bucket pump to only pump up what u want going out for the feed….i dont know how u can get enough gravity pressure tho so that it feeds the whole chain of drippers evenly! Blumats do it cuz how slow they drip and because feed line is setup on a loop starting and ending at reservoir!
You could I guess raise the system where P (psi) = 0.43 x H (ft) but still that's a stretch
The set up I used was a single 7 gal brew bucket straight out to my emitters.
To clarify There's a decent height difference between my reservoir and my emitters even on the floor. Hence the anti siphon gizmo (let alone a larger reservoir like a 15 gal keg. lol