The Snyder Industries 330 Gallon ASTM XLPE Heavy Duty Vertical Storage Tank is a crosslinked-polyethylene vertical tank built for demanding above-ground storage where a standard HDPE wall would be marginal. It holds 330 gallons in a natural white body, stands 68 inches tall on a 47 x 47 inch footprint, and carries a 1.9 specific gravity rating - meaning the wall is engineered for contents heavier than water, up to a max rated contents weight of 5,229 pounds. If you have been searching for a vertical storage tank in XLPE from Snyder, this is the heavy-duty build in that class.
Will it work for your site?
Start with the two weights that actually govern the install. Filled with plain water, this tank carries about 2,752 pounds; at its full 1.9 SG rating it is rated for 5,229 pounds of contents. Size your pad and any structural support to the heavier of the two numbers you expect to run - a properly sized, level concrete pad is the difference between a tank that lasts decades and one that stress-cracks at the base. Our concrete pad sizing guide walks the ACI framework for above-ground poly tanks, and the Tank Sizing Calculator and Tank Sizing Guide help you confirm 330 gallons is the right volume before you commit. For rural and remote fire-protection storage, this size class is a practical reservoir option - our fire-water reservoir design guide covers the NFPA 22 sizing discipline behind it.
Fittings and access
Per the technical drawing on this page, the tank comes configured with a flange fitting, an 18-inch polyethylene threaded and vented top opening, and a manway with 15-inch access diameter for interior inspection and cleaning - the 18-inch figure is the vented lid opening while the 15-inch figure is the usable manway access, so the two numbers describe different features rather than conflicting. Confirm the fitting locations and thread sizes on that drawing against your plumbing before you set the tank, since retrofitting a poly fitting after the fact is far harder than planning the tie-in up front. Note that a bolted flange connection needs a chemically compatible gasket sized to the flange; plan on supplying that gasket, as it is not included with the tank.
Why XLPE over standard HDPE
The crosslinked wall is the whole point of this model. Crosslinking bonds the polyethylene into a more impact- and stress-crack-resistant structure than linear HDPE, which is why this tank carries the higher 1.9 SG rating and the heavy-duty designation. If you are weighing whether crosslinking is worth it for your duty, our guide on Snyder XLPE vs HDPE lays out exactly when the upgrade earns its keep, and our Snyder Captor freeboard sizing guide covers the ASTM D1998 framework that governs poly-tank wall design. For heavier or engineered fluids, always match the contents' specific gravity to the tank's 1.9 rating - overrunning that number is the most common and most avoidable mistake on a heavy-duty vertical.
This tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, and freight is quoted live to your ZIP - get a number in seconds with our Freight Cost Estimator or call 866-418-1777 to lock in your order. List price shown is before freight.
