This is a paid asset, but now you can download Low Poly Water Cleaning Isometric 3D model Free.
Detail this asset from Unity Store: Original Link
Low Poly Water Cleaning Isometric VR / AR
Rendering standard in Cinema 4D. Texture file size(2048*2048), You can easily adjust the color by dragging the uv. Model ready for game, render, make videos, motion graphics, inforgraphic, 3d map..e.t.c. This package contains: water treatment, sewage treatment, pumping station, purification plant. There are many other packages here: https://www.cgtrader.com/linkdo
I hope this package save you time, If you like me do anything more let me know. Feel free to contact me. Thank you!