Just a Latin II project. The top part is the duct itself, with a 1-degree slant on the middle section of the aqueduct and a 1-degree slant on the bottom to promote water flow to the bottom part, which would hold the pump and extra water.
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/5BVM6KSyUvF
Whatever works for you. I used 0.1.
Preferably decently high, to prevent leakage.
You can use supports for the overhanging areas, but for a quick Latin project, I decided not to.