The Enduraplas 7011 gallon black vertical water storage tank (SKU TLV07011B) is a bulk-volume polyethylene reservoir for sites where one large tank beats stringing together a bank of smaller ones. At 7,011 gallons it stands 126 inches tall within a 144 by 144 inch footprint envelope, molded in black polyethylene to cut light penetration and slow algae growth in standing water. It is one of the larger vertical storage tanks Enduraplas builds, suited to agricultural irrigation reserves, rural fire-water reservoirs, bulk process-water buffering, and industrial water reuse trains.
Will it hold your water, and how heavy does it get?
On a tank this size the pad and the site are the first job. The weight math is worth verifying rather than trusting: full of water, contents run 7,011 gal x roughly 8.34 lb/gal = 58,472 pounds; at the maximum rated contents weight that figure becomes 58,472 lb x 1.1 SG = 64,319 pounds, and the 64,319 figure is the one to design the foundation against. That ceiling reflects the tank's 1.1 specific gravity rating, meaning it is rated to hold liquids up to 1.1 SG, slightly denser than plain water. For straight water service the full-water weight governs, but always pour and cure a level pad sized for the loaded condition. Our Tank Sizing Calculator and Tank Sizing Guide confirm the volume math before you commit, and the concrete pad sizing guide walks the ACI 360R-10 framework for a base under a load this large.
Footprint, fittings, and what to confirm before you order
The 144 by 144 inch dimensions are the overall footprint envelope of the cylindrical tank, not a literal square slab: the pad must fully support the circular base within that 12-foot envelope per the ACI 360R-10 guidance above. Fitting configuration for this listing - bulkhead outlet size and placement, fill, vent, and overflow provisions - is not published in this tank's spec data, so confirm it against the technical drawing on this page or by calling 866-418-1777 before you order. Do not assume an outlet location or thread size; on a 60,000-pound reservoir, getting plumbing and fitting placement right at the order stage saves a return-freight headache later.
Putting it into service
Once the pad is set and the tank is plumbed, prove it before you rely on it. A controlled water fill lets you monitor pad settlement and check every fitting under static head before the tank goes live; our hydrostatic test methodology guide covers fill discipline, hold-time math, and what to watch during the first fill. If this reservoir is sited in a cold climate as part of a rural or remote private fire-protection stack, the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection; black resin's solar gain can aid above-freezing retention but is not itself a freeze-protection feature. For grey-water, rainwater, or HVAC condensate aggregation, the industrial water reuse topology guide shows where a tank this size fits in a quality-banded storage train.
The mistake to avoid on a tank this big
The most common and most expensive error here is under-building the foundation. A 12-foot envelope holding nearly 60,000 pounds of water concentrates enormous load on the pad; an undersized or unlevel base leads to uneven settlement, wall stress, and fitting strain. Size the pad for the full loaded weight, confirm it is dead level, and stage the first fill slowly so you can watch the base react. And do not treat the 1.1 SG rating as room to store just anything: liquids heavier than 1.1 SG exceed this tank's rating and require a different, higher-rated tank - call 866-418-1777 to spec one.
This vertical storage tank ships LTL freight from the Enduraplas plant in Converse, TX, quoted live to your ZIP. Get an exact number with our Freight Cost Estimator or call 866-418-1777 to talk through delivery, offload, and siting on a tank this size.
