The Snyder Industries 8700 Gallon XLPE Vertical Double Wall Liquid Chemical Storage Tank in white is built for serious chemical containment, pairing a cross-linked polyethylene (XLPE) primary tank with an integral secondary containment wall in one vertical footprint. Rated to a 1.9 specific gravity, this is one of the heaviest-duty resins Snyder builds, which is exactly what you want when the liquid inside is denser than water and the consequence of a release is real. At 197 inches tall on a 142 by 142 inch footprint, this vertical double wall storage tank holds 8700 gallons with primary storage and built-in spill protection in a single shell, no separate berm required.
Will it work for your application?
Start with weight, because that drives everything downstream. Filled with plain water this tank carries roughly 72,558 lb, and at its maximum rated contents weight it reaches about 137,860 lb. That gap is the 1.9 SG rating made tangible: you have nearly 65,000 lb of additional contents capacity over water before you hit the rated ceiling, so you can fill to 1.9 SG and stay within the 137,860 lb design limit. Your foundation, pad, and any anchoring have to be engineered for that loaded mass, not the empty shell, and the 142 x 142 inch footprint is what your containment slab and clearances get designed around. Per the technical drawing on this page, fittings include a flange, an 18-inch threaded/vented fitting, and a manway with 15-inch access. That 15-inch access manway matters more than it looks: it determines whether a technician can reach the primary tank for inspection and what instrumentation you can drop in over the life of the tank. Always confirm the fitting layout against the technical drawing on this page before you finalize piping and venting, and for working out usable volume against your draw rate and freeboard, the Tank Sizing Calculator and Tank Sizing Guide will get you to the right number.
Chemical compatibility
This is an XLPE tank rated to 1.9 specific gravity, so it is engineered for dense, aggressive chemistries that a standard 1.5 SG HDPE tank should not hold. Compatibility is always concentration- and temperature-specific, so verify your exact chemistry against the OEM chemical-resistance chart before service. The chemicals below are compatible with this tank's XLPE resin at the listed concentrations, with the recommended wetted fitting and gasket materials:
- 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
- Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM 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 Carbonate (30%) - PVC fittings, EPDM gaskets
- Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
Read the wetted-material callouts carefully, because several chemistries deviate from the default PVC/EPDM hardware. Acetic Acid, Hydrofluosilicic Acid, Propylene Glycol, and Urea Solution want polypropylene-rated (PP) wetted fittings; DEF wants 316 stainless steel; and Hydrofluosilicic Acid wants Viton gaskets rather than EPDM. Matching the wetted hardware to the chemistry is as important as the tank resin itself. Full details live in our Chemical Compatibility Database.
The mistake to avoid
The most expensive error on a double wall chemical tank is treating it as a passive box. It is the last line of defense, not the only one. Pair it with proper level instrumentation and spill redundancy - our guides on level gauge selection for chemical service and high-level alarm and spillover redundancy engineering walk through how to layer those safeguards. If you are designing to SPCC under 40 CFR 112, read our Snyder Captor double-wall SPCC walkthrough and the freeboard sizing guide per ASTM D1998 so you size for thermal expansion and the real usable volume, not just the nameplate.
This vertical XLPE double wall storage tank ships LTL freight from Snyder's plant in Lincoln, Nebraska, quoted live to your ZIP. Get an exact number with our Freight Cost Estimator, or call 866-418-1777 and we will walk through fittings, foundation requirements, and delivery for your site.
