The Enduraplas 100 Gallon Black Vertical Storage Tank gives you a compact, freestanding 100-gallon polyethylene vessel that stands 43 inches tall on a 30 x 30 inch footprint. The black exterior blocks light to discourage algae growth in stored water, and the narrow base makes it a practical fit for tight pump houses, equipment sheds, and corner placements where a wider tank would not clear. If you are sizing storage for a rural water supply, a haul-and-store setup, or a small water reserve, this 100 gallon vertical storage tank is one of the easier units to position and plumb.
Will it hold up for your job?
This is a vertical storage tank molded from polyethylene with a 1.9 specific gravity rating, which is the strongest single point in its favor. The SG rating describes how much weight the tank wall is built to carry: filled to the brim with plain water the load is about 834 pounds, but the wall is rated to hold up to roughly 1,585 pounds of contents at its 1.9 SG ceiling. In plain terms, you are buying a heavy-duty wall that can carry a liquid up to about 1.9 times the weight of water without re-buying a different vessel. For irrigation, fire-water reserve, and general bulk water duty the 100-gallon size is a clean fit, and the extra structural headroom is there if you ever move to a denser, polyethylene-compatible fluid down the road. If you are unsure whether 100 gallons covers your draw-down and refill cycle, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide before you commit.
Placement, support, and what to confirm before you buy
Set this tank on a flat, fully supported base. A full vertical tank concentrates its weight on a small 30 x 30 inch footprint, so the pad underneath has to carry that load evenly without point-loading the bottom. For an above-ground install on a poured slab, our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI framework, and if the tank serves a rural fire-water reserve, the fire-water reservoir design guide covers NFPA 22 sizing discipline and freeze protection for cold-climate service. Before you order, refer to the technical drawing on this page to confirm lid opening, dimensions, and fitting locations, and plan on field-installing your inlet, outlet, and bulkhead hardware to suit your plumbing.
The mistake to avoid
The most common error on a small vertical tank is reading the 1.9 SG rating as permission to store any liquid. The rating is structural capacity for dense fluids, not chemical resistance — polyethylene tolerates many liquids and rejects others, so always verify your specific fluid against the resin before filling. Just as important, that check cannot stop at the tank wall: the bulkhead fitting body, its gasket or o-ring, and any valve must also be compatible with the stored fluid, since an EPDM gasket and a Viton gasket behave very differently in the same service. The second error is an undersized or uneven pad — a 100-gallon tank that rocks or tilts on a poor base will stress the bottom seam over time, so get the foundation flat and the full footprint supported.
This tank ships LTL freight from Converse, TX, and is quoted live to your ZIP — get a number in seconds with our Freight Cost Estimator, or call 866-418-1777 for help sizing, fitting, or scheduling delivery.
