The Snyder Industries 3500 Gallon HDPE Vertical Liquid Storage Tank in White is a 124-inch-tall vertical storage tank on a 96 x 96-inch square footprint, molded in High Density Linear Polyethylene and rated to a 1.9 specific gravity. That 1.9 SG rating is unusually high for a vertical storage tank this size and is the single most important number on the page: it tells you what the tank wall was engineered to hold, not just water.
Will it hold what you need it to?
Filled with water (SG 1.0), this tank carries roughly 29,190 lb of contents at the full 3,500 gallons - about 8.34 lb per gallon. Because the wall is rated to 1.9 SG, the same shell is cleared for liquids substantially heavier than water, up to a maximum rated contents weight of about 55,461 lb, or roughly 15.8 lb per gallon at the 1.9 ceiling. Those two multipliers let you compute the load for any liquid in between: take your liquid's weight per gallon and multiply by 3,500. Use that figure to plan the pad - water service loads the slab to ~29,000 lb, but a denser liquid drives the foundation and any containment toward the heavier end of the range. The 96 x 96-inch footprint concentrates that load over a 64-square-foot base, so a properly cured, level, fully supporting concrete pad is not optional at this capacity. If you are deciding between this and a smaller shell, the Tank Sizing Calculator and Tank Sizing Guide walk through capacity, footprint, and weight together.
One shell for water or heavier service
The 1.9 SG rating is also the reason to buy this particular shell. A standard 1.0 to 1.5 SG water tank cannot legitimately hold denser process liquids and brines, but this wall is engineered for them - so the same tank covers bulk water today and a heavier liquid later without re-buying when your service changes. Height is 124 inches, so confirm overhead clearance for both the tank and the fill plumbing above it before delivery. The white HDPE shell blocks light better than a natural translucent tank, which helps slow algae growth in standing water, though you lose the ability to read the liquid level through the wall. This is a true vertical HDPE storage tank in the 3,500-gallon class, the kind of vertical tank operators reach for in bulk water, fire-water reserve, and process make-up duty.
The mistakes to avoid
The most common error on a tall, heavy vertical tank like this one is treating the SG rating as a license to skip foundation math. A 1.9 SG rating does not mean the contents are free; it means the wall can hold them only if the pad underneath can too. Size the slab to the actual liquid you will store, not just to water. The second is ordering plumbing blind: fitting size, outlet location, and bulkhead and gasket spec are not listed in our catalog data for this model, so confirm them from the technical drawing on this page or by calling 866-418-1777 before you buy fittings. If this tank may ever see a denser liquid, verify that your gasket and seal material match that liquid as well - that compatibility is not something this listing can answer for you. For the engineering behind the wall, our breakdown of HDPE tank wall thickness and ASTM D1998 sizing logic explains why the wall is thickest at the base and why the vapor-space headspace deserves inspection attention, and if this is a private fire-protection install, our guide to fire-water reservoir tank design and NFPA 22 sizing covers reserve sizing and cold-climate freeze protection.
This tank ships LTL freight, quoted live to your ZIP, from the nearest Snyder plant that stocks it - either Albertville, AL or Merced, CA. On a ~29,000 lb tank that origin is the biggest cost variable, so use the nearer plant to sanity-check your quote: buyers in the Southeast pull from Albertville, AL, while West Coast buyers ship from Merced, CA. Get a real number for your delivery address with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. If you want to confirm this is the right capacity before you order, compare it against our 2000 gallon vertical tank guide and 500 gallon vertical tank guide.
