The Snyder Industries 550 Gallon HDPE Vertical Chemical Storage Tank in white is built for bulk chemical service, molded from high density linear polyethylene and carrying a 1.9 specific gravity rating. That SG number is the headline spec: it means the tank wall is engineered to hold contents up to 1.9 times the weight of water, which is what lets it safely store dense acids and concentrated solutions that would overstress a lighter water-grade tank. At 1.9, this tank already sits at the top of Snyder's standard chemical rating, so every chemistry documented below falls within rating with margin and you do not need to step up to a heavier tank for any of them. The tank stands 47 inches tall on a 64 x 64 inch footprint and holds 550 gallons. Search shoppers know this one as a vertical storage tank, an HDPE storage tank, or simply a Snyder chemical tank.
Will it work for your install?
Plan your pad and your rigging around real loaded weight, not the empty shell. Filled with water this tank weighs about 4,587 pounds; loaded to its full 1.9 SG rating it reaches roughly 8,715 pounds of contents. Size your foundation, anchoring, and forklift or crane capacity to that 8,715 lb figure if you intend to run dense chemistry. The 64 x 64 inch footprint should sit on a level, fully supported pad with no overhang. To convert your chemical's specific gravity and volume into a weight your slab can carry, run the numbers through our Tank Sizing Calculator and review the Tank Sizing Guide before you pour concrete.
Fittings and access
The molded-in fitting package, shown on the technical drawing on this page, includes a flange, an 18-inch PE threaded/vented fitting, a manway with 15-inch access, and two 16 x 16 inch flat fitting pads. The manway with 15-inch access gives you a route for interior inspection, cleaning, and gauge or vent hardware. The 18-inch threaded/vented port and the two flat pads are where you land your bulkhead and process fittings, and the fitting material you install there must match the chemical, not the tank: PVC, CPVC, PP, or 316 stainless per the compatibility list below, with the gasket likewise matched to the chemical. Confirm thread sizes and pad locations against the drawing before you spec your plumbing.
Chemical compatibility
This is an HDLPE tank rated to 1.9 specific gravity. Because the resin designation in our records reads as linear polyethylene, confirm HDLPE versus XLPE (crosslinked) suitability with the OEM before committing the tank to chemical service, since the two resins resist different chemistries and a 1.9 rating is unusually high for a standard linear PE wall. Always verify against the manufacturer's chemical-resistance chart, which is concentration- and temperature-specific, and match your fittings and gaskets to the chemical. Documented compatibility from that data includes Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS, EPDM), Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Magnesium Chloride (30%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Phosphoric Acid (85%, PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (under 16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Sulfuric Acid (98%, CPVC, Viton), Urea Solution (50%, PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM).
The single most common mistake on a chem tank is matching the gasket to the tank instead of to the chemical. Of the chemistries above, most run EPDM, but a specific set requires Viton (hydrochloric acid, hydrofluoric acid, hydrofluosilicic acid, hydrogen peroxide, phosphoric acid, sodium hypochlorite, and sulfuric acid) and one requires Aflas (peracetic acid). Note also that 98% sulfuric acid is the only line calling for CPVC fittings rather than PVC, a deliberate step up because concentrated sulfuric attacks standard PVC. Verify every line against the OEM chemical-resistance chart and our Chemical Compatibility Database for your exact concentration and temperature before you order valves and gaskets.
This tank ships LTL from the nearest Snyder plant in your direction, either Chowchilla, CA or Lincoln, NE; West-of-the-Rockies installs typically pull from Chowchilla while Central and Eastern installs pull from Lincoln, so confirm origin before quoting so the estimate reflects the closer plant. Freight is quoted live to your ZIP through our Freight Cost Estimator or by phone at 866-418-1777. Before you finalize, set up monitoring and labeling correctly: see our guide on selecting a tank level gauge for chemical service, the breakdown of Snyder Captor Plus 110% containment versus UL-142 for SPCC, and our reference on tank label and signage compliance.
