The Norwesco 5000 Gallon HDPE Vertical Liquid Storage Tank (SKU N-43833) is a 5,000-gallon polyethylene vertical storage tank built for bulk water and liquid holding where you need real volume in a single upright footprint. It stands 86 inches tall on a 141-inch diameter base, so it carries its capacity in a wide, low-slung profile rather than a tall, tippy column. The tank is molded with a 1.9 specific gravity rating, which means the wall is engineered to carry liquids substantially heavier than water without compromising the structure. Buyers shopping this Norwesco vertical storage tank are typically comparing 5000-gallon HDPE options, and this one earns its place on the strength of that rating and footprint.
What you're getting and how it's built
Top access on this tank is through a 22-inch lid (the tuna-can style) seated on a revised manway designed for that 22-inch opening - both are called out on the technical drawing on this page. That 22-inch opening is your working interface: size any add-on fill, vent, or access hardware, and any gaskets, to that 22-inch revised manway before you order, so nothing arrives mismatched. The lid itself gives you top access for fill, inspection, and cleaning.
Specific gravity, weight, and the pad
Rated to 1.9 specific gravity, this tank handles liquids up to roughly 1.9 times the weight of water - so it covers heavier solutions, not just water. If your liquid is lighter than water, you're buying structural margin; if it's heavier than 1.9 SG, this is not the right tank. Filled with water, the tank and contents weigh about 41,700 lbs, and at the 1.9 SG ceiling the maximum rated contents weight is roughly 79,230 lbs. Plan your pad around that: it must be level and load-rated for at least ~41,700 lbs of water spread across a full 141-inch (11.75 ft) diameter circle - size the pad to the 141-inch base, not smaller, and not to the empty footprint alone.
Sizing it right
If you're still deciding between this 5000 gallon vertical tank and a different capacity, run your numbers through the Tank Sizing Calculator and read the Tank Sizing Guide before you commit. This wide, stable footprint also makes the 5000-gallon vertical a common choice for rural fire-water reservoirs; the fire-water reservoir design guide walks through NFPA 22 sizing and freeze protection if that's your application. For a full walkthrough of this exact size, see the 5000 Gallon Vertical (141 x 86) buyer's guide.
The mistake to avoid
The most common error on a tank this large is underestimating the loaded weight and the pad it demands. People size the pad to the empty 141-inch diameter but forget that, once full, the structure carries tens of thousands of pounds concentrated on that base. The HDPE wall is thickest at the bottom and thins toward the top by design - the vapor-saturated headspace near the top is where premature failures tend to originate, which is exactly why over-filling beyond the marked capacity or ignoring the SG rating is risky. The HDPE wall-thickness guide explains the ASTM D1998 sizing logic behind that taper.
This tank ships LTL from the Norwesco plant in Hanford, CA, and freight is quoted live to your ZIP. If you're east of the Rockies, pull a number early from the Freight Cost Estimator - a 141-inch single-piece LTL move out of California is the kind of detail worth pricing before you commit. Have questions about the manway, fittings, or scheduling delivery? Call us at 866-418-1777 and we'll walk through it with you.
