The Snyder Industries 300 Gallon HDPE Vertical Liquid Storage Tank is a polyethylene vertical storage tank rated to 1.9 specific gravity, which is a heavier-wall build than the standard 1.5 SG tanks that dominate this 300 gallon class. At 82 inches tall on a compact 35 x 35 inch footprint, it stacks the volume into a vertical column, so you trade floor space for headroom. The 1.9 SG rating and the listed ASTM certification are the two facts that should anchor your decision, and both are covered below.
Will it work for your job
Full of water this 300 gallon tank carries 2,502 pounds, and the wall is rated to a maximum contents weight of 4,754 pounds, which is where the 1.9 specific gravity rating comes from. That gap between water weight and rated weight is the whole reason to buy a 1.9 SG vertical tank instead of a standard one: it is the heavier-wall option in the same volume class, and it lets you store liquids denser than water without overstressing the wall. If your liquid runs above roughly 1.5 SG, or you simply want extra wall margin for water service, this is the build to choose. The footprint is a tight 35 x 35 inches, so confirm your pad or containment area clears it before you set the tank. If you are weighing this against a shorter, wider tank of the same volume, run the numbers through the Tank Sizing Calculator and the Tank Sizing Guide, because the 82-inch height changes fill access and strapping versus a low-profile alternative.
Fittings and access
This vertical tank is configured with a manway for top access (a manway with an 8-inch access opening), an 8-inch polyethylene threaded and vented fitting, a flange, and two 6 x 6 inch fittings (one of them flat-faced). Match those outlet, flange, and vent locations against your pump and plumbing layout before installation, and reference the technical drawing on this page for the exact fitting positions and elevations. The 8-inch vented fitting earns its own callout: a sealed tank can collapse under vacuum during fast draw-down or balloon during rapid fill, so do not cap the vent path. Note too that thread and gasket material at the flange and the 6 x 6 fittings governs compatibility with your liquid just as much as the tank wall does, so confirm the seal chemistry, not only the SG. For why the vapor-saturated headspace deserves attention on a vertical HDPE tank, see our guide on HDPE tank wall thickness and ASTM D1998 sizing logic.
The mistake to avoid
The common error on a 1.9 SG tank is treating the specific gravity number as a capability you have to use rather than a margin you get to keep. For plain water service at 8.34 pounds per gallon you are nowhere near the 4,754-pound rated ceiling, which is exactly the cushion you want. The real mistake is assuming that a higher SG rating substitutes for compatibility: SG covers weight only, not whether a given liquid is compatible with the HDPE wall, the threaded fittings, or the elastomer gaskets at the flange and 6 x 6 outlets. This listing carries no potable, NSF, or food-grade claim, so verify those requirements separately if your application demands them. If you are sizing for fire reserve or another engineered duty, our fire-water reservoir design guide and the related-size 300 gallon vertical storage tank buyer's guide walk through the trade-offs.
This 300 gallon vertical HDPE storage tank ships LTL freight from a single Snyder Industries plant in Lincoln, Nebraska, quoted live to your ZIP code, so buyers far from Nebraska should expect higher freight and run the ZIP quote first. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 to confirm the fitting configuration and lock in your delivery before you order.
