Hello little one,
indeed as Oli specifies, the tank A is permanently supplied that could be a source or a river,
then we use the air pressure in the tank B
to raise the water from tank C,
according to the principle of the Heron fountain:
http://we152.lerelaisinternet.com/AMSLL ... c120880969,
for proper and permanent operation, you must be able to
drain tank B when it is full:
- either a vent will be used to supply it with air or the "air return"
by its connection with the tank C is sufficient
- and to empty it you have to find a simple and effective way because
in fact the "tantalum siphon" cannot be used, the water being
also pressurized and propelled by its conduit,
either a valve controlled when the tank is full or
a timed solenoid valve or with a contact,
all comments and suggestions are welcome