Check out Plastic water tank 3D model purchase 3D model on CGTrader for $10. High-quality mesh by jaketnet2012. Textured.
SLDPRT (SolidWorks, filesize: 6.64 MB), JPG (JPG, filesize: 11.5 MB), PNG (PNG, filesize: 11.5 MB), MAX (Autodesk 3ds Max, filesize: 28.4 MB), FBX (Autodesk FBX, filesize: 4.43 MB)