The 20 Gallon Vertical Liquid Storage Tank from Norwesco (N-44846) is a compact polyethylene vertical tank built for low-volume liquid storage where floor space is tight. It stands 28 inches tall on a 16 x 16 inch footprint, so it slots into utility rooms, equipment skids, trailers, and pump houses without sprawling across the pad. The molded white polyethylene wall carries a 1.5 specific gravity rating, giving you headroom above the weight of plain water for denser liquids.
Will it fit and will it work?
This is a 20-gallon white vertical storage tank. To plan the install: it needs 16 x 16 inches of fully supported, level base and about 28 inches of vertical clearance, plus room above to lift off the 8-inch lid for filling and access. Filled with plain water the tank and contents weigh about 167 pounds, light enough to handle without rigging. The polyethylene wall is rated to carry contents up to roughly 250 pounds, which is where the 1.5 specific gravity rating comes from: at 20 gallons, that lets you run liquids up to about 1.5 specific gravity (around 12.5 pounds per gallon) versus water at about 8.34 pounds per gallon. If you are still settling on volume, the Tank Sizing Calculator and Tank Sizing Guide help you match capacity to your actual draw and refill cycle.
Fittings and plumbing
Plan your plumbing before you order, because this tank is not pre-plumbed. The top has an 8-inch lid opening for filling and access, and the wall carries one flat molded landing for adding a fitting. No outlet is molded in: that single flat-for-fitting spot is where you install your own bulkhead fitting and gasket (sold separately), and you should confirm the size against the technical drawing on this page. Honor that one fitting location rather than cutting extra penetrations the wall was not designed for. The 8-inch lid and the flat-for-fitting detail are both shown on the technical drawing on this page, so verify the lid size and your planned connection line up first.
The mistake to avoid
The most common misstep on a small vertical storage tank is reading the 1.5 specific gravity rating as a license to store any liquid. The rating defines the maximum density the wall is built to carry, not chemical compatibility. Before storing anything other than water, confirm the liquid's specific gravity stays at or below 1.5 and that polyethylene suits the chemistry. If your liquid runs heavier than 1.5 specific gravity, this tank is not the right wall rating, so call 866-418-1777 before you buy rather than overloading it. The second misstep is a support error: set the tank on a flat surface that carries the entire 16 x 16 inch footprint rather than spanning gaps or unsupported framing. For a permanent slab install, the guide on concrete pad sizing for above-ground polyethylene tanks covers how to support an above-ground polyethylene tank so the wall is not point-loaded.
This Norwesco vertical storage tank ships LTL freight from a Norwesco plant (Sheldon, IA, or Mississippi), quoted live to your ZIP code. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 to talk through your setup. We will help you confirm the right tank and the freight before you commit.
3 Year Warranty
