The Snyder Industries 400 Gallon Vertical Chemical Storage Tank (SII-32306) is a 1.9 specific-gravity polyethylene vertical tank built for bulk chemical service where lighter water-only tanks fall short. It stands 80 inches tall on a 40 x 40-inch footprint, so before you commit to a spot, confirm overhead clearance for fill lines, a level gauge, and any vent or manway hardware on the dome. The 1.9 SG rating is the spec that matters most here: it tells you the tank wall is engineered to hold liquids substantially heavier than water, which is what lets it carry concentrated acids and dense salt brines safely.
Will it work for your application?
This is a vertical storage tank in white polyethylene, rated at 400 gallons. Plan around weight, not just volume. Filled with plain water it carries 3,336 pounds; loaded to its maximum rated contents at the 1.9 SG limit it reaches 6,338 pounds. That difference is why the pad matters: a slab or ring foundation sized for water can be badly undersized for a heavy chemical. Size the foundation to the 6,338-pound figure if you intend to run a dense chemistry, and use the Tank Sizing Calculator and Tank Sizing Guide to match capacity and weight to your throughput before you order.
Chemical compatibility
This tank is rated to 1.9 specific gravity. The exact resin designation is not confirmed in our records, so confirm whether you need HDLPE or XLPE construction with us at 866-418-1777 before committing it to chemical service - the resin choice changes which chemistries and temperatures are appropriate. Compatibility, fitting material, and gasket material below are drawn from the OEM chemical-resistance chart and are concentration- and temperature-specific; verify your exact conditions against that chart and our Chemical Compatibility Database.
Common chemistries this 1.9 SG tank is matched for include sodium hypochlorite (under 16.5%, PVC fittings, Viton gaskets), sulfuric acid (98%, CPVC fittings, Viton gaskets), hydrochloric acid (37%, PVC, Viton), phosphoric acid (85%, PVC, Viton), hydrogen peroxide (50%, PVC, Viton), ferric chloride (50%, PVC, EPDM), aluminum sulfate (50%, PVC, EPDM), calcium chloride (40%, PVC, EPDM), sodium carbonate (30%, PVC, EPDM), potassium hydroxide (saturated, PVC, EPDM), acetic acid (60%, PP/PVC, EPDM), and DEF (32.5%, 316SS fittings, EPDM) along with urea solution (50%) and ethylene glycol (100%). More aggressive oxidizers such as peracetic acid (30%) call for 316SS fittings and Aflas gaskets, while ozonated water (up to 10 PPM) runs on PVC and EPDM. Other matched chemistries include ferric sulfate, ferrous sulfate, magnesium chloride, hydrofluoric acid (48%, Viton), hydrofluosilicic acid (26%), polyaluminum chloride, potassium carbonate (50%), propylene glycol, sodium bisulfate, sodium bisulfite, sodium thiosulfate, and zinc orthophosphate. The mistake to avoid: matching only the tank resin and ignoring the fitting and gasket column. A tank wall can be fully compatible while a wrong-elastomer gasket fails in weeks - pair EPDM, Viton, or Aflas to the specific chemical as the chart directs.
Fittings, gauging, and compliance
Specify fittings and gaskets per the compatibility data above, and plan your level measurement up front - our guide on tank level gauge selection for chemical service walks through radar, ultrasonic, hydrostatic, and magnetostrictive options for bulk poly tanks. For secondary containment, compare approaches in Snyder Captor Plus 110% containment versus UL-142 and SPCC. Round out the install with label and signage compliance for bulk polyethylene storage and a chemical sampling protocol for ongoing quality checks. See the technical drawing on this page for fitting locations and overall dimensions.
This 400 gallon Snyder vertical chemical tank ships LTL freight from the nearest Snyder plant to you - either Albertville, AL or Merced, CA - with the rate quoted live to your ZIP. Get your freight quote to your ZIP with the Freight Cost Estimator or call 866-418-1777, and our team will confirm resin construction and fitting recommendations before your order ships.
