The Snyder Industries 300 Gallon ASTM Black Heavy Duty Vertical Storage Tank (SKU 1011200N51) is a 300-gallon black polyethylene vertical tank built to a 1.9 specific gravity rating. At 1.9 SG it is engineered to carry contents up to roughly 1.9x the density of water, which is the reason to choose it over a standard 1.0-1.35 SG water tank whenever your stored liquid is heavier than water. It stands 82 inches tall on a compact 35 x 35 inch footprint, a high, narrow profile that suits tight equipment pads, well houses, and corner installs. Before you commit to a capacity, run your numbers through our Tank Sizing Calculator and the Tank Sizing Guide.
What it holds and how it is fitted
Filled with water, this 300 gallon tank carries roughly 2,502 pounds of contents; at its full 1.9 SG rating it is engineered to support up to 4,754 pounds. The tank ships with a flange, two 6" x 6" fittings (one flat), an 8" polyethylene threaded and vented fitting, and a manway with 8" access. The 8" fitting is vented so the tank breathes during pump-in and draw-down on a closed top. Confirm your pump and plumbing connections, along with the gaskets at each outlet, match the 8" threaded fitting and the 6" x 6" fittings before you set the tank. Exact fitting placements and elevations are shown on the technical drawing on this page, so verify each outlet lines up with your layout first.
The black polyethylene choice and interior access
The black color blocks light and suppresses algae growth, which is why it is a common pick for outdoor water, storage, and industrial standby duty where a translucent tank would green over. The 8" manway access is a real service advantage on a closed-top vertical: it lets you reach the interior for cleaning and inspection over the tank's full service life. This is a heavy-duty ASTM vertical tank designed for above-ground stationary service on a level, fully supported pad. Because it stands 82 inches tall on a 35 x 35 inch base, plan the pad and site for that height, including clearance under doorways and roof lines during install. Our guide on concrete pad sizing for above-ground polyethylene tanks covers the foundation, and if this unit feeds a rural fire reservoir or cold-climate standby, the fire-water reservoir design guide and our industrial water reuse topology guide cover the sizing and staging around it.
The mistake to avoid
The most common error on a vertical storage tank like this is filling to the top brim rather than to the rated fill line. A polyethylene tank needs freeboard for thermal expansion and to keep the sidewall load within its 1.9 SG limit; treat that headroom as part of the design, not spare volume. The Snyder freeboard sizing guide walks through the ASTM D1998 math on the volume you can actually use.
This 300 gallon vertical storage tank ships LTL freight from the Snyder plant in Lincoln, NE, quoted live to your ZIP. Get your exact number from the Freight Cost Estimator, or call 866-418-1777 and we will size the tank, confirm the fittings, and book the freight with you.
