You can pump water uphill without power by using an inverted siphon which is how the Romans used to pump water uphill before power or other pumps were available.
The Romans made water flow uphill by using inverted siphons.
The inverted siphons allowed water to flow uphill in their aqueduct systems.
The Romans inverted siphons were essentially a U shaped pipe with an entrance to the pipe and were used to carry water across valleys, by leveraging the principle of water returning to it's original height after a plunge down one side of a valley.
When the pipes had to span a valley, the Romans basically built a siphon underground.
And a vast dip in the land that caused the water to drop so quickly had enough momentum to make it uphill.
Siphons are part of the mechanism that makes toilets flush, too.
Inverted siphons are a type of pipe which carries liquids such as water or wastewater, etc across an obstacle, like a river, road or other thing, using a combination of pressure and gravity.
Inverted siphons work by dropping the pipe below the obstacle, creating a low point and then rising it back up on the other side.
Doing this, allows the liquid to flow through the siphon and then continue it's journey, even when it crosses a physical barrier.