The Enduraplas 1125 Gallon Black Vertical Storage Tank is a polyethylene vertical tank built for above-ground bulk water storage where you need real volume without a tall profile. It holds 1,125 gallons inside an 85-inch base yet stands only 56 inches tall, so it is a genuinely low-profile vertical that fits under low sheds, overhangs, and equipment canopies that taller 1,000-plus-gallon verticals will not clear, and it keeps the fill port within easier reach. The black poly shell keeps light out of the stored water.
Will this vertical storage tank work for your site?
This is a 1,125-gallon vertical tank with an 85.0 x 85.0 inch footprint and a 56-inch overall height. At full water capacity it holds roughly 9,382 pounds of water, so the pad and any supporting structure must carry that load plus the tank's own weight. The shell carries a 1.9 specific gravity rating, and at that rating the maximum supported contents weight is about 17,827 pounds. That is the buying advantage here: the tank is over-built for plain water (SG 1.0, ~9,382 lb), which leaves generous warranty headroom for standard service and means the same tank can hold a much denser fluid up to ~17,827 pounds of contents without exceeding its shell rating. If a dense fluid or brine is ever in play, that 1.9 rating is the reason to choose this over a 1.0 or 1.35-SG tank. Not sure whether this capacity and footprint match your draw rate and storage duration? Run the numbers with our Tank Sizing Calculator and review the Tank Sizing Guide before you order.
Foundation and application
A 9,382-pound water load on an 85-inch base concentrates real weight, so the support surface is not an afterthought. For above-ground poly tanks the pad needs to be flat, fully bearing under the entire base, and sized to the load. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework and where the ACI 318 boundary applies. This vertical storage tank suits process and bulk water storage, rainwater and reuse collection, and rural fire-water reservoir duty; if fire protection is the use case, our fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection. For grey-water, rainwater, and HVAC condensate aggregation, see our industrial water reuse tank topology guide.
The mistake to avoid
The most common error on a tank this size is underbuilding the foundation or setting it on uneven ground. Polyethylene tanks rely on continuous, even support across the full base; a tank set on a partial pad, gravel high spots, or a surface that settles unevenly will load the shell wall in ways it was not designed to take. Confirm the full 85-inch base is supported and level before you fill. The second trap is assuming the 1.9 SG shell rating covers everything: that rating protects the tank wall only. For any fluid heavier than water, the bulkhead seal, outlet, and gasket or O-ring elastomer must be separately rated for that fluid's chemistry and density. Fitting configuration is not specified in this listing, so confirm the exact bulkhead, outlet thread size, lid arrangement, and gasket material you need for your plumbing and your fluid before installation. Refer to the technical drawing on this page for dimensional layout, and call 866-418-1777 to spec fittings.
This tank ships LTL freight from our plant in Converse, TX, with freight quoted live to your ZIP code. Note that the 9,382 lb and 17,827 lb figures are loaded-contents weights for pad design only; freight is based on the empty tank as an oversize LTL shipment. Get your freight quote with the Freight Cost Estimator, or call us at 866-418-1777 to confirm fittings, lead time, and delivery scheduling for your project.
