The Snyder Industries 120 Gallon ASTM Black Heavy Duty Vertical Storage Tank is a compact, high-strength vertical tank built to a 1.9 specific-gravity rating, which is why it earns the "heavy duty" label: the polyethylene wall is engineered to carry contents up to 1.9 times the density of water. At 51 inches tall on a 34 x 34 inch footprint, it holds 120 gallons and drops onto a small pad, into a corner of a pump house, or onto a skid without demanding a lot of floor space. The black exterior blocks light to slow algae growth, making this a practical black storage tank for water, and the vertical profile keeps the center of gravity low as it fills.
Will this Snyder vertical storage tank work for your setup?
Full of water this tank weighs about 1,001 pounds, and its 1.9 SG wall rating allows a maximum rated contents weight of roughly 1,902 pounds. For dense fluids, remember that the 1,902-pound weight ceiling, not the 120-gallon volume, is the binding constraint: the tank can hold liquids heavier than water only up to that load limit. Use both numbers to size your foundation, because a full vertical tank concentrates that weight onto a 34 x 34 inch base, so the pad below it has to be flat, level, and continuously supported. Our Tank Sizing Calculator and Tank Sizing Guide help you confirm the tank matches your volume and refill cycle, and for the slab itself see our guide on concrete pad sizing for above-ground polyethylene tanks.
Fittings and access
The technical drawing on this page shows the fitting layout for this tank: a flange fitting, a 14-inch polyethylene threaded and vented fill point, and a manway with an 11-3/8 inch clear access opening. That vented threaded top lets the tank breathe as it fills and drains, and the 11-3/8 inch manway sets the hard limit on any pump, float switch, or cleaning tool you plan to pass inside, so check that clearance before you buy hardware. Match your inlet and outlet thread and the 14-inch vented PE bung to your bulkhead or flange fittings, and confirm every position and elevation against the drawing before you plumb, since those dimensions drive your pipe runs and valve placement.
Common sizing mistake to avoid
Because this tank carries a 1.9 SG rating, buyers sometimes assume any liquid is fair game. The rating governs weight, not chemical resistance. This is a black water storage tank, so keep it in water and general non-aggressive service and use the weight numbers above to stay within the tank's rated load. If your application is a rural fire reserve, our guide on fire-water reservoir tank design walks through NFPA 22 sizing and cold-climate freeze protection.
This vertical storage tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, with the exact cost quoted live to your ZIP. Get a number in seconds with our Freight Cost Estimator, or call 866-418-1777 to talk through fittings, sizing, and delivery with our team.
