The Norwesco 45 Gallon Plastic Portable Flat Bottom Utility Tank is a compact polyethylene utility tank built for portable water haul, fleet refill, and spot-storage work where a low, stable footprint matters more than vertical height. It holds 45 gallons in a flat-bottom form measuring 22 inches tall, 18 inches wide, and 38 inches long, so it slides into a truck bed, trailer, or skid frame and sits flat without a stand. The tank is molded in white polyethylene and carries a 1.5 specific gravity rating, meaning the wall is built to hold contents heavier than water up to that density.
Will this tank work for your job?
Sizing is the first thing to settle. Filled with water, this Norwesco utility tank weighs about 375 pounds, and its maximum rated contents weight is 563 pounds, so the structure has real headroom for denser-than-water fluids up to the 1.5 specific gravity rating. That higher SG wall is a structural advantage, not just a caution: if your service liquid runs heavier than water, this tank is built to carry it up to that 563-pound contents ceiling, where a lighter 1.0 or 1.1 SG utility tank would not be. Match that load against the surface you plan to mount on: the 18 by 38 inch footprint concentrates weight over a small area, so the deck, trailer frame, or pad underneath has to carry it without flexing. If you are working out load math for a fixed install, the Tank Sizing Calculator and Tank Sizing Guide walk through weight, footprint, and support. For above-ground placement on concrete, the guide on concrete pad sizing for above-ground polyethylene tanks covers the ACI 360R-10 framework.
The mistake to avoid
The most common error with a utility tank like this is treating the 1.5 specific gravity rating as a green light for any heavy liquid. It is a structural rating for fluid density, not a chemical-compatibility approval. Polyethylene tolerates some fluids and degrades under others, and there is no chemical-compatibility data published for this tank, so any non-water service has to be confirmed against the manufacturer's chemical-resistance chart at your specific concentration and temperature before you fill it. For rainwater, grey-water, or HVAC condensate capture, stay within water service and read the guide on industrial water reuse tank topology, which covers quality-banded storage for reuse water.
Fittings and the technical drawing
For outlet, bulkhead, and lid details, see the technical drawing on this page, which shows the molded port and fill-opening locations for this 45 gallon Norwesco white utility tank. Confirm those positions against your plumbing before you order any couplings or hose, and match your bulkhead fitting and gasket to the molded thread shown on the drawing and to the fluid you are storing. Norwesco supplies the molded ports; you supply the couplings and hose to fit them.
This Norwesco tank ships LTL freight, palletized, and is quoted live to your ZIP rather than priced flat. Norwesco molds from several plants, and your order ships from the location nearest you to keep freight down: Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Shawnee, OK; Sheldon, IA; or St. Bonifacius, MN. Get an exact LTL number with the Freight Cost Estimator, or call 866-418-1777 for help matching the right Norwesco utility tank to your application.
