The Snyder Industries 400 Gallon ASTM Black Heavy Duty Vertical Storage Tank is a polyethylene vertical storage tank built to the ASTM standard and rated to a 1.9 specific gravity, so it carries liquids heavier than water. It holds 400 gallons, stands 62 inches tall on a 45 by 45 inch footprint, and molds in black to shield contents from light and slow algae growth in outdoor water storage. If you are cross-shopping a black 400 gallon Snyder vertical tank, this is the heavy-duty ASTM build.
Will it work for your site?
Plan the pad and plumbing around the full loads, not the empty shell. With plain water at 400 gallons, contents weigh 3,336 lb; at the full 1.9 specific gravity rating the tank is engineered to carry up to 6,338 lb of contents. The 6,338 lb figure is the governing number: size a level, continuously supported base for it, not for the lighter water weight. The 45 by 45 inch footprint is the tank body, so your pad should exceed 45 by 45 to catch the base and any overhang. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm the tank matches your draw-down and refill before you order.
Fittings and access
Per the technical drawing on this page, this tank carries a flange fitting, an 18 inch polyethylene threaded and vented lid, a 6 inch by 8 inch fitting, and a manway. The vented 18 inch lid is your breathing point, so keep it clear and never plumb it shut, or the tank will not breathe as it fills and drains. Confirm the manway diameter on the drawing before you assume a pump or a person can enter for cleaning and inspection. Match your inlet, outlet, vent, and overflow connections to the fitting sizes and elevations shown, and match the bulkhead-fitting gasket material (EPDM versus Viton) to the liquid you are storing. The 1.9 specific gravity rating covers the tank wall, not the seal elastomers, and the fitting seal is the most common leak point on a tank this size. That 1.9 rating is near the top of the polyethylene range, giving you headroom to run denser liquids without moving to a different tank.
Freight and ordering
This Snyder tank ships by LTL freight from the Lincoln, NE plant, quoted live to your ZIP code. The most common ordering mistake on a tank this size is treating freight as an afterthought or under-sizing the pad for the 6,338 lb loaded weight, so run your delivery ZIP through the Freight Cost Estimator first and build the base for the full load. For help matching this tank to your application, call 866-418-1777. Working through a rural fire-water reservoir, a reuse or rainwater train, or a concrete pad detail? See our guides on fire-water reservoir tank design, industrial water reuse tank topology, and concrete pad sizing for above-ground polyethylene tanks.
