The Snyder Industries 330 Gallon HDLPE Vertical Tank stores 330 gallons in a 47-inch-square footprint that stands 50 inches tall, molded in opaque white High Density Linear Polyethylene and stamped to ASTM specification. It carries a 1.9 specific gravity rating, which is the number that tells you what this tank can actually hold without flexing past its design margin. For water and similar storage at or near 1.0 SG, that rating leaves you a wide cushion.
Will it work for your install?
The tank measures 47 inches wide by 47 inches long by 50 inches tall, so plan a level pad at least 47 inches square plus clearance for fittings and access. Filled with water, the contents weigh about 2,752 pounds; the structure is rated to carry up to 5,229 pounds of contents at its 1.9 SG limit. That weight rating is why the 1.9 SG matters even on a water tank: the wall thickness is built for dense liquids, so plain water never comes close to stressing it. For the pad, size against roughly 5,229 pounds of contents plus the tank weight spread over a 47 by 47 inch footprint (about 15.3 square feet) - our concrete pad sizing guide lays out the ACI 360R-10 framework for turning that load into a real bearing spec. If you are still deciding between sizes, the Tank Sizing Calculator and Tank Sizing Guide walk through footprint, height, and capacity together.
What the ASTM and opaque markings actually mean
The opaque white pigment blocks light, which limits algae growth in standing water service, and the ASTM D1998 reference governs wall thickness for the rated specific gravity. Neither is a chemical clearance. If this 330 gallon vertical tank is going into a rural fire-water reserve, read our fire-water reservoir tank design guide for NFPA 22 sizing discipline - a poly tank holding standing water in cold climates needs a vented lid and a freeze-management plan, both covered there. If you are banking several tanks together for grey-water, rainwater, or condensate reuse, the industrial water reuse tank topology guide covers quality-banded storage trains.
The mistake to avoid
Do not read the ASTM stamp and 1.9 SG rating as clearance for any dense liquid. The rating defines a weight ceiling, not a chemical clearance. Any liquid other than water should have its compatibility confirmed against the manufacturer's chemical resistance chart before service, and the gasket elastomer - EPDM, Viton, or Buna - is selected against the stored chemical independent of the tank wall's SG rating. The outlet, bulkhead, and lid configuration on this tank is confirmed by part number before order, so call 866-418-1777 to verify the exact outlet size and gasket build for SII-1008200N52 against your contents rather than assuming a penetration set.
This Snyder 330 gallon vertical tank ships LTL freight from Chowchilla, CA, with cost quoted live to your ZIP. Get your freight rate in seconds with our Freight Cost Estimator, or call 866-418-1777 to talk through sizing, fittings, and delivery with a person.
