tanks

Classical Mechanics Level 1

In the diagram, which tank will become full first?

Details and Assumptions:

Water flows out of the faucet so slowly that the flow never exceeds the carrying capacity of the pipes.
All tanks are open at the top. All pipes have equal diameters.
The centers of the tops (and bottoms) of the tanks all lie in the same plane. So, tanks that are higher in the diagram are actually higher.