230 Gallon Low Profile Water Tank Low profile water tanks are suitable for storage and transport applications. Every tank is approved for water usage and is ideal where available height is limited. There are numerous locations suitable for fittings on these versatile tanks. The deep ribbing will provide extra strength and will also reduce sloshing when used in transport. See our website about our other size and application water tanks! Our Norwesco tanks are made out of rotationally molded linear, high-density polyethylene resin that provides outstanding environmental stress crack resistance. The resin is UV stabilized.