The Snyder Industries 440-gallon vertical liquid storage tank is a white HDPE vessel built to ASTM standards, standing 69 inches tall on a 53 x 53-inch square footprint. It carries a 1.9 specific-gravity rating, which is the heaviest contents density this vertical tank is engineered to hold, and that rating is the first thing to check against what you plan to store. That 1.9 figure is unusually high for a water-class tank, and it is worth treating as a feature, not just a ceiling.
Will this vertical storage tank work for your application
This is a 440-gallon vertical tank molded from polyethylene, 69 inches high with a 53.0 x 53.0 footprint. Full of water it weighs about 3,670 pounds; at its maximum 1.9 specific-gravity rating it is engineered to carry up to 6,972 pounds of contents. Use those two numbers to size your pad and to confirm the floor or stand under it can take the load when the tank is full. The 440-gallon figure is nominal, so confirm your water draw against it and plan to leave freeboard below the lid rather than filling to the brim. The technical drawing on this page shows the dimensioned outline and fitting placement.
For outlets and access, the drawing on this page calls out a flange fitting and an 18-inch polyethylene threaded, vented lid. Confirm the flange location and size against your plumbing run before you set the tank, and match your bulkhead or adapter hardware to the flange detail in the drawing. Check the flange height off the floor against the drawing too, so you know how much usable draw-down you get below the outlet before the tank runs dry. The 18-inch vented lid gives you top access for fill and inspection while letting the tank breathe as liquid moves in and out. If you are still settling on capacity for your water draw, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide before you commit.
Sizing and load planning
The full water weight of roughly 3,670 pounds is your everyday planning number for water service; the 6,972-pound figure at the 1.9 SG rating is the ceiling and matters only if you ever move to a denser liquid. Pour a level pad sized to at least the full 53 x 53-inch footprint plus a few inches of bearing margin per side. For above-ground concrete pad guidance, see Concrete Pad Sizing for Above-Ground Polyethylene Tanks, which lays out the ACI 360R-10 framework, and for how HDPE wall thickness is engineered per ASTM D1998, the wall-thickness guide is worth a read. If this tank is going into a rural fire-water or reserve role, the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection.
The mistake to avoid
The trap on a vertical tank like this is setting it on an undersized or unlevel base. At nearly two tons full of water, an uneven pad concentrates load on one part of the wall and shortens the tank's life. Size the pad to the full 53 x 53-inch footprint, keep it level, and plan the plumbing so the flange and the 18-inch vented lid stay accessible. The second trap is assuming the 1.9 SG rating lets you plumb the tank for any liquid without checking compatibility. The wall is HDPE, but the chemical and temperature attack actually happens at the fittings, so match the flange gasket and any bulkhead adapter elastomer to your stored liquid and its specific gravity. If you are moving to a denser-than-water chemical, that 1.9 SG rating is the headroom that makes this tank a better pick than a 1.0 or 1.1 SG water-only vessel rated only for the weight of water.
This Snyder Industries vertical storage tank ships LTL freight from Marked Tree, Arkansas, quoted live to your ZIP code. Get your freight quote with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and answer any fitting or sizing questions before you order.
