The Snyder Industries 1550 Gallon Vertical Double Wall HDLPE chemical storage tank is built for aggressive liquid containment where a single-wall tank will not pass a secondary-containment review. Rated to 1.9 specific gravity, this white double-wall vertical tank stands 136 inches tall on a 76 x 76 inch footprint and integrates a primary tank inside an outer containment shell, so a breach in the inner wall is captured in the annular space between the walls rather than released to the floor. It carries a flange, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for gauging, fill, and maintenance. If you are searching for a vertical storage tank or double wall tank built by Snyder for chemical duty, this is the configuration that handles dense, corrosive liquids at full rating.
Will it hold your chemical and how do you fit it out?
The 1.9 S.G. rating is the number to size against. Water fills this tank to roughly 12,927 pounds, but the tank is engineered to carry contents up to 24,561 pounds, which is what lets it hold liquids substantially heavier than water at full volume. At 1.9 specific gravity this is already at the top of the standard HDLPE chemical-tank rating range; confirm your chemical's specific gravity before ordering and stay at or under 1.9, and if your liquid exceeds 1.9 S.G., call us before ordering because a heavier rating is not available in this configuration. The factory fitting package - flange, 18-inch PE threaded/vented opening, and the manway with 15-inch access - covers fill, vent, and access; the annular space between the inner and outer wall is also where you monitor for a primary-wall breach, so plan your leak-detection or level instrumentation around it (the tank level gauge selection guide for chemical service walks through the gauging options). Use the Tank Sizing Calculator and Tank Sizing Guide to confirm volume and weight against your pad. See the technical drawing on this page for fitting locations and dimensions.
Chemical compatibility
This is an HDLPE tank rated to 1.9 specific gravity. The chemicals below are compatible with this resin and SG rating at the concentrations noted; always verify against the OEM chemical-resistance chart, which is concentration- and temperature-specific, before committing to service. Fitting and gasket materials are listed per chemical because the tank resin is only half the system - the wrong gasket or fitting elastomer is the most common containment mistake on a tank that is otherwise correctly specified. The decision rule across this list: EPDM is the default gasket for most chemicals; oxidizers and strong acids (hydrochloric, hydrofluoric, hydrogen peroxide, sodium hypochlorite, phosphoric, sulfuric, hydrofluosilicic) require Viton; peracetic acid requires Aflas. Most ports run PVC, PP, or CPVC fittings, but DEF and peracetic acid are the two chemicals here that require stainless 316SS wetted fittings rather than plastic.
- Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
- Calcium Chloride (40%) - PVC fittings, EPDM gaskets
- DEF (32.5%) - 316SS fittings, EPDM gaskets
- Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
- Ferric Chloride (50%) - PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) - PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) - PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) - PVC fittings, Viton gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Peracetic Acid (30%) - 316SS fittings, Aflas gaskets
- Phosphoric Acid (85%) - PVC fittings, Viton gaskets
- Polyaluminum Chloride - PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
- Potassium Hydroxide (Saturated) - PVC fittings, EPDM gaskets
- Propylene Glycol - PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) - PVC fittings, Viton gaskets
- Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
- Sulfuric Acid (98%) - CPVC fittings, Viton gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
For the full lookup including chemicals not listed here, use the Chemical Compatibility Database. If you are specifying this tank for spill-containment compliance, the Snyder Captor double-wall walkthrough for SPCC 40 CFR 112 covers how an integral double-wall design fits a containment plan.
Freight and how to order
This tank ships LTL freight from the Snyder plant in Philippi, West Virginia, and freight is quoted live to your ZIP - we never bundle it into the list price. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 and we will quote it and confirm fitting and gasket selection against your chemical before you buy. Background on this size class is in the 1550 gallon vertical storage tank buyer's guide.
