The Snyder Industries 4900 Gallon HDPE Vertical Liquid Storage Tank is a 90-inch-diameter, 202-inch-tall vertical storage tank molded in white high-density linear polyethylene and carrying ASTM certification. With a 90.0 x 90.0 inch footprint and a straight-wall vertical profile, it is built for bulk water and liquid storage where a tall column and a compact ground footprint matter more than spreading the load wide. The shell is rated to a 1.9 specific gravity, the number that tells you whether your liquid is too heavy for the wall - on this tank it covers water and liquids up to 1.9 times the density of water.
Does it work for your liquid?
Start with weight, because that is what sizes your pad and your anchoring. Filled with water this 4900-gallon tank carries roughly 40,866 lb of contents; at its maximum rated 1.9 specific gravity it can hold up to 77,645 lb. Those two numbers bracket what the wall is engineered to take. Here is the upside of that ceiling: this same compact 90 x 90 footprint is rated all the way to 1.9 SG, so if you are storing a liquid heavier than water - brine, certain fertilizer solutions - this vertical tank is the heavy-duty option and you do not need to step up to a different shell. The factory fittings give you real plumbing options: an 18-inch PE threaded/vented top fitting, a flange, a manway with a 15-inch access opening, two-to-three-inch S.U.M.O. fittings, a 12-inch x 14-inch fitting, and a flat fitting location. Connecting to the flange and S.U.M.O. ports requires matching bolt-up gaskets and bulkhead seals sized to those openings, and the 18-inch threaded fitting takes a PE-threaded mating cap or adapter - confirm thread and bolt patterns against the technical drawing on this page before you order mating hardware.
Pad, anchoring, and sizing discipline
A vertical tank this size lives and dies on its foundation, so design to the worst case, not the water case. Across the 90 x 90 inch footprint, the maximum rated 77,645 lb load works out to roughly 12 psi of bearing pressure on the pad - design the slab and subgrade to that figure, not to the 40,866 lb water weight. Our concrete pad sizing walkthrough using the ACI 360R-10 framework shows how to size the slab and where the ACI 318 boundary sits. Because polyethylene walls thin toward the top, the wall thickness at the vapor-saturated headspace is where premature failures tend to start; our deep dive on HDPE wall thickness and the ASTM D1998 sizing logic explains why liquid-side inspection misses it. If you are still confirming whether 4900 gallons fits your draw-and-refill cycle, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide. For rural fire-water reservoir duty, our NFPA 22 sizing and freeze-protection guide covers how a vertical HDPE tank fits the private fire-protection stack.
The mistakes to avoid
The single most common error on a tank this size is planning the foundation and anchoring around the water weight and then filling it with something heavier. The 1.9 specific gravity rating is the ceiling, not the operating point - if your liquid sits anywhere above water's 1.0, size your pad, hold-downs, and inlet plumbing to the heavier figure, and never store a liquid whose specific gravity exceeds 1.9. The second mistake is treating a 202-inch-tall column as if it plumbs like a short tank: the single 18-inch vented top fitting is the only listed breathing path, so size your fill-and-draw rate to what one 18-inch vent can pass - if your pump rate outstrips it, add venting rather than throttling that fitting, or you risk pulling a vacuum on draw-down. Finally, respect the access limit: the 15-inch manway opening is adequate for inspection and lowering equipment, but on a 16.8-foot column it is a confined-space entry and the only access listed, so plan cleanout and any internal work around that single 15-inch opening.
This Snyder vertical storage tank ships LTL freight, quoted live to your ZIP from the Lincoln, NE plant. Get an exact freight number through our Freight Cost Estimator or call 866-418-1777 to lock in your delivery. List price is shown above and is quoted before freight.
