I proved two things, and disproved one!
Experiment:
Attach a siphon hose to the tank inlet, see if gravity feed will fill the tank.
Hypothesis:
Yes, it will.
Method:
No siphon hose available... no hose available... made a hose out of plastic, duct taping the seam, duct tape the "hose" to an old tank fitting. Fill "hose" with water until the tank starts to fill.
Outcome:
Tank didn't fill, even when water was one foot over the rim.
Dis-proved hypothesis!
Proved that "hose" didn't hold water well (leaked like crazy)
Proved that the tank required pressure to activate. How much pressure is unclear.
I was hoping I could get video of it working... no such luck. The tank actuator (at least mine) is pressure activated. A better experiment with better quality components would be needed to determine if a gravity feed system would be able to fill a toilet tank. Sorry, I guess I have to leave that one up to you.
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