The Snyder Industries 500 Gallon Vertical Water Storage Tank (SII-32511) is a black polyethylene vertical tank built for above-ground bulk water storage on a compact 48 x 48 inch footprint. Stated cleanly, it measures 48 inches across by 76 inches in overall height and holds 500 gallons - the kind of vertical storage tank that gives you real capacity without sprawling sideways, so it fits a pump-house corner, a barn wall, or a poured pad where floor space is tight.
Will it work for your water
This tank carries a 1.0 specific gravity rating, which is correct for water and water-density liquids. Filled to its full 500 gallons, the water alone weighs about 4,170 pounds, and that figure is also the maximum rated contents weight - so plan your foundation around roughly two tons of standing load on a 48 x 48 inch base. The black color blocks light, which helps discourage algae growth in stored water. For matching capacity to your actual draw and refill cycle, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide before you commit to a size.
Mounting, foundation, and fittings
Concentrated weight over a small base means the pad matters. A full vertical tank of this size needs a level, continuously supported surface rated for the load - a cracked or uneven pad lets the tank wall flex where it shouldn't. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework for getting that foundation right. If you're weighing this vertical against a horizontal layout for the same volume, our breakdown of vertical vs horizontal water-storage tradeoffs covers the footprint and stability differences. Fitting sizes, gasket material, and outlet placement aren't published for this SKU - confirm them against the technical drawing on this page, or call before you order plumbing parts so your inlet, outlet, and overflow line up with how you'll route the line.
The mistake to avoid
The most common error with a vertical water tank this size is treating the pad as an afterthought. At 4,170 pounds full, an unsupported or out-of-level base is the failure mode that ends a tank's service life early - not the polyethylene itself. Build the foundation first, set the tank dead level, and route your plumbing off the technical drawing. One more boundary worth stating: this tank is rated for water at 1.0 specific gravity and is not a chemical tank. Storing something denser than water? This 1.0-SG tank isn't rated for it - use the Tank Sizing Guide or call 866-418-1777 to spec a higher-SG tank instead of pushing this one past its rating.
This 500 gallon vertical water storage tank ships LTL freight, quoted live to your ZIP. Get your number from the Freight Cost Estimator, or call 866-418-1777 to confirm fittings, foundation, and delivery for your site.
