The Snyder Industries 7900 Gallon HDPE Vertical Liquid Storage Tank is built for high-volume bulk water storage, where one large reservoir replaces a bank of smaller tanks. It holds 7,900 gallons in a 120-inch by 120-inch footprint and stands 177 inches tall, molded in white polyethylene by Snyder Industries and carrying a 1.5 specific gravity rating. At 14 feet 9 inches overall, this is one of the largest single HDPE vertical storage tanks we list for water service, so getting the pad, plumbing, and freight right matters before you order.
Will this tank work for your site
The number your foundation engineer needs first is the maximum rated contents weight: 98,829 pounds at the tank's 1.5 specific gravity rating. Size the pad to that figure, not the water weight. Full of water at roughly 8.34 pounds per gallon, the tank carries about 65,886 pounds of contents at the 7,900-gallon line, so the 1.5 rating gives you roughly 33,000 pounds of headroom above water duty. That means it is already built to handle denser liquids up to 1.5 SG without stepping up to a heavier tank. A vessel this size demands a properly designed, level concrete pad sized to the full 120-inch by 120-inch footprint and the loaded weight; our Concrete Pad Sizing for Above-Ground Polyethylene Tanks guide walks through the ACI 360R-10 and ACI 318 framework for exactly this scenario. To confirm 7,900 gallons fits your draw and refill cycle, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide.
Fittings and access
Per the technical drawing on this page, this tank comes configured with a flange, an 18-inch PE threaded and vented opening, and a manway with 15-inch access. The 15-inch clear access supports interior inspection and cleaning, which matters on a vessel this tall where the upper shell needs periodic eyes-on attention. Because these fittings are factory-molded and not field-relocatable, confirm the flange size and bolt pattern, and the 18-inch threaded fitting's gasket, against your inlet and outlet plumbing before you order. Use the technical drawing on this page to verify outlet placement and fitting orientation against your plumbing layout before you set the tank.
A common mistake to avoid
The most frequent oversight on a tank this large is treating wall thickness as uniform top to bottom. ASTM D1998 sizes the wall to the hydrostatic head, so the base is thick while the upper shell and the vapor-saturated headspace are comparatively thin, which is where premature failures tend to originate. Our guide on HDPE Tank Wall Thickness at the Vapor-Saturated Headspace explains why liquid-side inspection alone misses these spots, and the 15-inch manway is your access point for checking them. If this tank is going into rural fire-water or reservoir duty, the Fire-Water Reservoir Tank Design guide covers NFPA 22 sizing discipline and cold-climate freeze protection.
This vertical tank ships LTL freight from the Snyder plant in Lincoln, Nebraska, palletized and quoted live to your ZIP code. At nearly 15 feet tall it needs real thought on site access and offloading, so get a number for your delivery address with our Freight Cost Estimator, or call 866-418-1777 to talk through access, equipment for a vessel this size, and lead time. We will help you confirm the right HDPE vertical storage tank for your project before it ships.
