The Enduraplas 1400 Gallon Vertical Liquid Storage Tank (EP-THV01400BK) is a black polyethylene vertical tank built for bulk water and liquid storage where you need real capacity in a square 80-inch footprint. It stands 79 inches tall on an 80 x 80 inch round base, holds 1,400 gallons, and carries a 1.9 specific gravity rating, a heavy-duty spec that lets the tank wall handle liquids substantially denser than water. The black wall blocks light to discourage algae growth, which matters for stored water that sits for weeks between draws.
Will it work for your site?
Start with the load. Filled with water this vertical storage tank carries roughly 11,676 pounds of contents, and at its full 1.9 SG rating it is built to hold up to about 22,184 pounds, which works out to roughly 15.9 pounds per gallon at the ceiling. That weight lands on an 80 x 80 inch footprint, so figure on about 11,676 pounds of water spread over a 6,400 square inch base your pad has to carry. Set this tank on a continuously supported, level base: a poured concrete pad sized for the loaded weight is the right call, not bare gravel or timber sleepers. Our concrete pad sizing guide walks through the ACI framework for getting that base right. If you are still settling on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match gallons to your draw rate and refill cycle. Plan vertical clearance too: the 79-inch shell plus any vent stack or top fitting needs room under an eave or roof line.
Where it fits in a water system
At 1,400 gallons this is a practical size for rural fire reserve, rainwater capture, irrigation buffering, and industrial water reuse trains. The black wall and the high 1.9 SG rating make it flexible across stored-liquid duties. One honest trade-off on a black tank: it absorbs heat in full sun, so stored-water temperature will run warmer than a lighter tank would. For fire protection planning, our fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection. If you are aggregating grey water, rainwater, or HVAC condensate, the industrial water reuse topology guide explains how to band stored water by quality.
The mistake to avoid
The one that bites people on a tank this size is the foundation. Eleven-plus thousand pounds of water on a base that flexes or settles unevenly will overstress the tank wall at the bottom knuckle, and that is where premature failures start. Build the pad for the loaded weight, keep it level and fully supporting the entire base, and don't let the tank cantilever over an edge. If you plan to store anything denser than water, confirm the contents stay within the 1.9 SG rating before you fill, because that rating is the ceiling, not a suggestion. For the outlet and bulkhead sizes plus gasket material, confirm the fitting layout on the technical drawing on this page and by phone before you plumb it in rather than assuming a thread size. For more on where polyethylene walls fail and why, see our guide on HDPE wall thickness and where failures originate.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP. Get an exact number with the Freight Cost Estimator, or call us at 866-418-1777 and we will price the delivery and answer any sizing questions before you order.
