The Snyder Industries 5500 Gallon HDPE Vertical Liquid Storage Tank is a large-format vertical storage tank built in white polyethylene and rated to a specific gravity of 1.5, which means the wall is engineered to hold liquids up to 50 percent denser than water across the full 5,500-gallon column. The tank stands 221 inches tall on a 90 x 90 inch footprint and ships with ASTM D1998 certification, putting it squarely in the class of HDPE vertical tanks operators specify for fire-water reserve, bulk water, and heavier process liquids. If you are deciding whether this Snyder vertical tank fits your site, this page answers the three things that matter: whether it works for your liquid, how it ships, and the one mistake to avoid.
Will it work for your liquid and your pad?
The 1.5 specific gravity rating is the headline spec, and it is also the qualifier. This is the heavier-duty variant: filled with water (SG 1.0) the contents weigh 45,870 pounds, but loaded to the tank's maximum rated density of 1.5 the contents can reach 68,805 pounds. If you only need ambient water, a standard 1.0-rated vertical is lighter and costs less; choose the 1.5 rating when your liquid runs denser or you want structural headroom. That heavy-case number drives everything below the tank, so size your concrete pad and check soil bearing against the full 68,805-pound load, not the water weight. The footprint is 90.0 x 90.0 inches. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm the column volume against your draw rate, and read our guide on concrete pad sizing for above-ground polyethylene tanks before you pour.
Fittings, access, and the gasket detail people miss
Per the technical drawing on this page, this vertical tank carries a flange, an 18-inch PE threaded and vented top fitting, a fitting flat positioned at 272.5 degrees for clean side-wall mounting, and a S.U.M.O./FTG outlet arrangement. Maintenance access is through a manway with a 15-inch access opening, the route for interior inspection and cleaning. Confirm each fitting size and elevation against the drawing before you plumb the inlet, vent, and outlet, since the fitting flat placement and manway opening define where your connections land. One detail buyers overlook: the flange and S.U.M.O. connections need gaskets and mating hardware rated for your stored liquid at the 1.5 SG service. The tank wall can be compatible while the gasket is not, so confirm gasket and mating-part material, not just the tank.
The mistake to avoid
Wall failures on tall HDPE verticals do not start where you inspect them. On a 221-inch column the most stressed region under static head is the lower wall, but premature cracking frequently originates at the vapor-saturated headspace near the top, where liquid-side inspection misses it entirely. Remember too that nominal capacity is not usable reserve: the 5,500-gallon rating includes freeboard you cannot draw down, which matters when you are sizing a fire-water reserve. If you are putting anything other than ambient water in this tank, match the chemistry to the 1.5 SG rating and read our breakdown of HDPE tank wall thickness at the vapor-saturated headspace and the ASTM D1998 freeboard sizing logic. For rural fire-protection duty, our guide on fire-water reservoir design and NFPA 22 sizing covers freeze protection and reserve sizing for cold-climate sites.
This tank ships LTL freight from the Snyder plant in Lincoln, Nebraska, with the rate quoted live to your ZIP code. At 90 inches wide and over 18 feet tall, plan delivery for an oversized vertical: a flatbed with forklift or crane offload, and clear overhead access on site. Get a real number from our Freight Cost Estimator, or call 866-418-1777 for help confirming fittings, lead time, and delivery on this 5,500-gallon HDPE vertical storage tank.
