The Snyder Industries 3650 Gallon Vertical Liquid Storage Tank (SKU SII-8190000N43) is a white HDPE (high-density linear polyethylene) cylinder rated for a 1.5 specific gravity, sized for serious bulk water storage on farms, fire-protection sites, municipal yards, and industrial wash-down operations. At 102 inches in diameter and 126 inches (10.5 feet) tall on a 102.0 x 102.0 inch footprint, it holds 3,650 gallons in a single vertical column, so it fits a roughly 9-by-9-foot pad while reaching up rather than out. Before you schedule delivery, confirm your overhead and door clearance against that 10.5-foot height. This is the Snyder vertical HDPE storage tank that buyers searching for a vertical storage tank in the 3,000-plus-gallon class keep coming back to.
Will this tank work for my site?
Filled with water, this tank carries about 30,441 pounds, and at its full 1.5 specific gravity rating it is engineered for contents weighing up to 45,662 pounds. That is the number that drives your pad design, not the dry weight: a 9-by-9 footprint pushing 15 to 23 tons demands a properly engineered, level concrete pad. Run your loads through the Tank Sizing Calculator and read the Tank Sizing Guide before you pour, and use the Concrete Pad Sizing for Above-Ground Polyethylene Tanks guide for the ACI 360R-10 framework and the ACI 318 boundary. The 1.5 SG rating means the wall thickness has margin to spare for plain water service, and the HDPE wall-thickness guide explains the ASTM D1998 sizing logic behind that figure.
Fittings and 15-inch manway access
The technical drawing on this page shows the full fitting layout for SII-8190000N43: a flange, an 18-inch PE threaded and vented fitting, a manway with 15-inch access, a 12-inch by 13.75-inch fitting on a S.U.M.O. flat, and additional S.U.M.O. flat fitting locations. Confirm the exact fitting positions, thread types, and outlet sizes against that drawing before you set the tank, because relocating a bottom outlet or adding a fitting after the fact on a vertical tank this size is a field problem you want to avoid. Match your bolt-on flange gaskets and threaded-fitting seals to the drawing's thread types before you order plumbing - the flange and the 18-inch PE threaded/vented fitting both call for properly matched gaskets and bulkhead hardware. The 15-inch manway access governs whether your cleaning and inspection tooling will fit, so verify that opening matches your maintenance plan, and call 866-418-1777 if you need help confirming the fitting hardware.
The mistake to avoid
The single most common error on a tank this large is treating the dry footprint as the whole story and skipping the pad engineering for the full 45,662-pound rated load. The second is assuming a vertical tank can be tilted or laid down for transport or relocation - it cannot, and the fittings are placed for upright service only. If you ever plan to store anything heavier than water, the 1.5 SG rating is your ceiling, so check the contents density first. For chemical service above 1.5 SG, or where secondary containment is required, step up to a Snyder Captor double-wall configuration - the Snyder freeboard sizing guide walks through SG, freeboard, and the real usable volume math, or call 866-418-1777 and we will point you to the right configuration.
This tank ships LTL from the Snyder plant in Marked Tree, Arkansas, with freight quoted live to your ZIP. Get your exact number with the Freight Cost Estimator, or call 866-418-1777 and we will quote it by phone and help you confirm the right tank for your site.
