The Snyder Industries 250 Gallon HDLPE Vertical Double Wall Liquid Chemical Storage Tank is built for one job: holding aggressive chemistry inside a self-contained primary-and-secondary shell rated to a 1.9 specific gravity. The white High Density Linear Polyethylene tank stands 83 inches tall on a compact 34 x 34 inch footprint, so it fits a tight containment pad while still carrying a serious chemical load. With a 250 gallon working volume, this is the double wall vertical tank to spec when you need integrated containment without pouring a separate berm. It ships as a bare configurable shell, so fittings and gaskets are selected to match your chemical, not pre-installed.
Is it sized for your acid?
The product is built around sulfuric acid service, and the numbers line up: 98% sulfuric acid runs roughly 1.84 specific gravity, comfortably inside this tank's 1.9 SG rating. That 1.9 rating is what lets the structure carry a heavy chemical load - full of plain water the tank holds about 2,085 lb, but the rating means it is engineered for roughly 3,962 lb of contents at maximum density. Treat 3,962 lb as the structural ceiling, not a fill target: real chemical service needs freeboard for thermal expansion, so you load to a reduced volume below that line. The Captor freeboard sizing guide walks the density-and-temperature math, and the Tank Sizing Calculator plus Tank Sizing Guide help you match usable volume to turnover. The pack's compatible chemicals top out at this 1.9 SG build, so there is no heavier-rated tank you need to step up to.
Chemical compatibility
This is an HDLPE (High Density Linear Polyethylene) tank with a 1.9 specific gravity rating, the heavy-density build appropriate for dense and aggressive liquids. Compatibility depends as much on the fitting and gasket material as on the tank wall, so match those to the chemical, not to the polyethylene. Always verify against the OEM chemical-resistance chart for your exact concentration and operating temperature. The hero service for this tank is Sulfuric Acid at 98% - run CPVC fittings and Viton gaskets there. Beyond acid, it is also configured for non-acid duty: DEF, urea solution, glycols, and sodium and potassium salts. The full list, with recommended fitting and gasket materials:
- Sulfuric Acid at 98% - CPVC fittings, Viton gaskets
- Hydrochloric Acid at 37% - PVC fittings, Viton gaskets
- Phosphoric Acid at 85% - PVC fittings, Viton gaskets
- Hydrofluoric Acid at 48% - PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid at 26% - PP/PVC fittings, Viton gaskets
- Acetic Acid at 60% - PP/PVC fittings, EPDM gaskets
- Peracetic Acid at 30% - 316SS fittings, Aflas gaskets
- Sodium Hypochlorite at <16.5% - PVC fittings, Viton gaskets
- Hydrogen Peroxide at 50% - PVC fittings, Viton gaskets
- Ferric Chloride at 50% - PVC fittings, EPDM gaskets
- Ferric Sulfate at 60% - PVC fittings, EPDM gaskets
- Ferrous Sulfate at 20% - PVC fittings, EPDM gaskets
- Aluminum Sulfate at 50% - PVC fittings, EPDM gaskets
- Polyaluminum Chloride - PVC fittings, EPDM gaskets
- Calcium Chloride at 40% - PVC fittings, EPDM gaskets
- Magnesium Chloride at 30% - PVC fittings, EPDM gaskets
- Sodium Carbonate at 30% - PVC fittings, EPDM gaskets
- Potassium Carbonate at 50% - PVC fittings, EPDM gaskets
- Potassium Hydroxide at saturated - PVC fittings, EPDM gaskets
- Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
- Sodium Thiosulfate at 40% - PVC fittings, EPDM gaskets
- Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets
- DEF at 32.5% - 316SS fittings, EPDM gaskets
- Urea Solution at 50% - PP/PVC fittings, EPDM gaskets
- Ethylene Glycol at 100% - PVC fittings, EPDM gaskets
- Propylene Glycol - PP/316SS fittings, EPDM gaskets
- Ozonated Water up to 10 PPM - PVC fittings, EPDM gaskets
For the full reference, see our Chemical Compatibility Database. Concentration and temperature drive every one of these recommendations, so verify your specific service conditions before ordering fittings.
The mistake to avoid
The most common error on a double wall chemical tank is matching fittings and gaskets to the tank wall instead of to the chemical. Sulfuric acid at 98% calls for CPVC fittings and Viton gaskets - put EPDM on that service and the gasket fails long before the tank does. Watch the elastomer exceptions: two services here will not run on the common PVC/Viton combination. Peracetic acid at 30% needs 316SS fittings with Aflas gaskets - not PVC, and not Viton - while zinc orthophosphate and propylene glycol both call for 316SS rather than plain PVC. Because this tank ships without fittings, bulkhead fittings, gaskets, and vents are all spec'd per chemical and ordered separately; call 866-418-1777 to spec them so you do not pair the wrong elastomer with your service. If you are building this into an SPCC program, our Snyder Captor double-wall SPCC walkthrough covers the containment math, and level gauge selection and spillover redundancy engineering round out a layered safeguard design.
This double wall vertical storage tank ships LTL freight from the Snyder plant in Lincoln, NE, quoted live to your ZIP code. Get a number in seconds with our Freight Cost Estimator, or call 866-418-1777 to talk through fittings, gasket selection, and delivery scheduling with a real person.
