The Snyder Industries 330 Gallon Vertical Storage Tank (part 5750100N48) is a black, ASTM-grade vertical storage tank molded from crosslinked linear polyethylene (XLPE) with a 1.9 specific gravity rating. That crosslinked wall is what separates this from a standard water-only vessel: it is built to hold denser contents than plain water without stressing the wall, and the opaque black resin resists UV degradation and light-driven algae growth for outdoor storage. If you searched for a vertical XLPE storage tank in black and landed here, this is the heavy-duty end of that shelf. It ships LTL from Snyder's plant in Marked Tree, Arkansas — buyers across the Mid-South and Southeast tend to see a shorter, lower freight quote.
Will it work for your setup?
The tank stands 68 inches tall on a 47 x 47 inch footprint, so plan your pad and any overhead fill clearance around those numbers. Filled with water it carries roughly 2,752 lb; because the wall is rated to 1.9 SG, the maximum rated contents weight climbs to about 5,229 lb — meaning you can run a liquid up to 1.9 times the density of water and stay inside the wall's rating. The technical drawing on this page shows the fitting stack: a flange, an 18-inch PE threaded and vented top opening, and a manway with 15-inch access that serves as your cleanout and inspection port. Bring the correct gasket or bulkhead adapter to seat against the flange, and confirm your fill and vent line threads to the 18-inch PE threaded/vented fitting before buying adapters. To size the tank against your daily draw or reserve target, run the Tank Sizing Calculator or read the Tank Sizing Guide.
Why crosslinked polyethylene here
XLPE is not interchangeable with standard HDPE — the crosslinked wall is what earns the higher SG rating. Our guide on Snyder XLPE vs HDPE walks through where crosslinking pays off. For fire-reserve and rural water storage, the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection for cold-climate service.
The mistake to avoid
Do not skip the pad. A full rated load near 5,229 lb concentrated on a 47 x 47 inch footprint demands a poured, level, load-rated base — an uneven or undersized pad is the most common way these vertical tanks get damaged. Our concrete pad sizing guide lays out the ACI 360R-10 framework. Second: 330 gallons is nominal shell capacity, not fill-to-the-brim working volume — leave freeboard for thermal expansion and plan your draw against usable volume, not the full 330. The freeboard sizing article explains that math per ASTM D1998.
This tank ships LTL freight from Marked Tree, Arkansas, quoted live to your ZIP — get your number in seconds with the Freight Cost Estimator or call 866-418-1777 to lock in delivery and confirm fitting details before you order.
