The Snyder Industries 1100 Gallon HDPE Vertical Double Wall Tank is built for one of the harshest jobs in chemical storage: holding aggressive liquids like 98% sulfuric acid inside a primary shell, with an integral outer wall that catches the contents if the inner tank ever fails. Molded from high density linear polyethylene and rated to a 1.9 specific gravity, this white double wall vertical tank stands 104 inches tall on a 76 x 76 inch footprint, giving you full secondary containment without building a separate dike. The 1,100-gallon primary tank with its contained outer wall is what makes this the right HDPE storage tank for SPCC sites and indoor chemical rooms where a spill is not an option.
Will it work for your application?
This is a heavy-duty vertical storage tank rated to 1.9 specific gravity, so it carries dense chemicals that a standard 1.0 or 1.5 SG tank cannot. Filled with water it weighs about 9,174 pounds; loaded to its maximum rated contents at the 1.9 SG rating it reaches roughly 17,431 pounds. Size your pad, anchoring, and forklift or crane capacity to that loaded 17,431-pound figure, not the empty shell or the water weight. The tank comes configured with a flange, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for gauging and maintenance reach. Confirm exact fitting locations, elevations, and the interstitial access between the inner and outer walls against the technical drawing on this page before you finalize plumbing, leak-monitoring provisions, and skid layout. If you are sizing this against your tote turnover or batch volume, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide first.
Chemical compatibility
The primary shell is HDLPE rated to 1.9 specific gravity, which is what lets it carry the dense acids and concentrated solutions below. Match every wetted fitting and gasket to the chemical, not just the tank wall, and always cross-check the OEM chemical-resistance chart for your specific concentration and operating temperature before committing. The following chemicals are within this tank's rated service at the concentrations shown:
- Sulfuric Acid at 98% — CPVC fittings, Viton gaskets
- Hydrochloric Acid at 37% — PVC fittings, Viton gaskets
- Hydrofluoric Acid at 48% — PP/PVC fittings, Viton gaskets
- Phosphoric Acid at 85% — PVC fittings, Viton gaskets
- Hydrogen Peroxide at 50% — PVC fittings, Viton gaskets
- Sodium Hypochlorite at <16.5% — PVC fittings, Viton gaskets
- Ferric Chloride at 50% — PVC fittings, EPDM gaskets
- Aluminum Sulfate at 50% — PVC fittings, EPDM gaskets
- Peracetic Acid at 30% — 316SS fittings, Aflas gaskets
- Potassium Hydroxide at saturated — PVC fittings, EPDM gaskets
- DEF at 32.5% — 316 stainless fittings, EPDM gaskets
- Ethylene Glycol at 100% — PVC fittings, EPDM gaskets
This is a partial list of this tank's rated service; calcium chloride, magnesium chloride, ferric and ferrous sulfate, sodium carbonate, sodium thiosulfate, potassium carbonate, urea solution, and ozonated water (up to 10 PPM) are also compatible. Browse every chemical with its required fitting and gasket pairing in our Chemical Compatibility Database, and for double-wall containment specifically, the Snyder Captor Double-Wall Tanks for SPCC 40 CFR 112 walkthrough covers how this style of tank earns its place in your spill-prevention plan.
The mistake to avoid
The most common error on a tank like this is matching the gasket and fitting to the tank wall instead of to the chemical. The HDLPE wall handles a wide range of acids, but the wetted hardware does not, and the differences are not subtle. Because sulfuric acid is right there in the product name, note that 98% sulfuric calls for CPVC fittings with Viton gaskets — not the plain PVC that hydrochloric and phosphoric acid use, and not the PP/PVC that hydrofluoric acid takes. DEF is the other trap: at 32.5% it requires 316 stainless steel fittings with EPDM, not plastic hardware, and peracetic acid needs 316SS with Aflas. Specify the wrong elastomer or the wrong fitting body and you will have a leak at the fitting long before the tank ever shows wear. The 1.9 SG rating is the other guardrail — it is sized for dense liquids, so do not assume a lighter-rated tank will do the same job. Pair the right gasket and fitting body with the right concentration off the OEM resistance chart and this tank will outlast the chemical inside it. For instrumentation, the tank level gauge selection guide for chemical service walks through radar, ultrasonic, hydrostatic, and magnetostrictive options for aggressive media.
This vertical double wall HDPE storage tank ships LTL freight from the Snyder plant in Philippi, West Virginia, quoted live to your ZIP — get your freight rate with our Freight Cost Estimator or call 866-418-1777 to talk through fittings, containment requirements, and lead time with a tank specialist.
