The Enduraplas 550 Gallon Black Vertical Water Storage Tank is a polyethylene vertical tank built for above-ground bulk water storage where you need real capacity without a sprawling footprint. It is a low-profile vertical at 52 inches tall and 60 inches across, holds 550 gallons, and carries a 1.1 specific gravity rating - meaning the wall is rated for contents up to 10 percent denser than plain water. For straight water storage, that rating gives you comfortable headroom.
Will this tank work for my site?
Filled with water, this tank weighs about 4,587 pounds, and its wall is rated to carry contents up to 5,046 pounds. That full-water figure is the number that governs your pad: roughly 4,587 pounds of water (plus the tank's own dead weight) lands on a 60 by 60 inch base. That five-foot square is 25 square feet, so you are putting on the order of 183 pounds per square foot onto the ground - which means the tank needs a flat, fully supporting, level base across the entire bottom, not a ring or partial bearing. A reinforced concrete pad is the standard approach. Our Concrete Pad Sizing for Above-Ground Polyethylene Tanks guide walks through the ACI 360R-10 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 and refill cycle.
Common uses and the mistake to avoid
As a vertical storage tank this 550-gallon size fits rural water supply, irrigation reserve, fire-water reservoir duty, and water reuse trains. If you are building a private fire-protection reserve, the Fire-Water Reservoir Tank Design guide covers NFPA 22 sizing discipline and cold-climate freeze protection; for grey-water, rainwater, and HVAC condensate aggregation, see Industrial Water Reuse Tank Topology. The mistake to avoid is reading the 1.1 specific-gravity number as a license to store dense or aggressive chemicals - this is a water-storage tank, and that rating is your margin for water duty, not a chemical-service spec. If your contents exceed 1.1 specific gravity or are chemically aggressive, you need a higher-SG-rated chemical tank; call us at 866-418-1777 and we will spec the right tank for your fluid. The black wall blocks light to suppress algae growth, which is why a black vertical tank is a smart pick for stored water that sits.
Setting it up right
Fitting and outlet sizes are shown on the technical drawing on this page; we will confirm available bulkhead fitting and gasket configurations for your install when you order. Before you put the tank into service, fill it with water and hold it to confirm the pad does not settle and the fittings do not weep. Our Hydrostatic Test Methodology for New-Install Tank Acceptance guide gives you the water-fill discipline, settlement monitoring, and hold-time math. Refer to the technical drawing on this page for exact dimensions before you plumb anything.
This tank ships LTL from the Enduraplas plant in Converse, TX, with freight quoted live to your ZIP - distance from Converse to your delivery point is what drives the rate, so a precise quote matters. Get yours on the Freight Cost Estimator, or call us at 866-418-1777 and we will quote it by phone. Listed before freight; we will confirm transit and accessorial options for your site when you order.
