The Snyder Industries 1550 Gallon Vertical Double Wall HDLPE chemical storage tank is built for aggressive liquid service that a single-wall tank cannot safely contain. Molded in opaque white high density linear polyethylene with a 1.9 specific gravity rating, this double wall tank pairs a primary storage vessel with an integral secondary containment shell, giving you built-in spill protection without pouring a separate containment dike. It stands 136 inches tall on a 76 by 76 inch footprint, so plan your pad and overhead clearance before delivery. See the technical drawing on this page for the full dimensional layout.
Will it work for your liquid?
The 1.9 SG rating is the number that matters most here. It tells you the heaviest fluid this tank is engineered to hold: up to 1.9 times the density of water. Filled with plain water (1.0 SG) the contents weigh roughly 12,927 lbs; loaded to its maximum rated content density the tank carries up to 24,561 lbs. That headroom is why a 1.9 SG vessel is the right call for dense acids and concentrated solutions, not just dilute water-like fluids. At 1.9 SG this is the heaviest wall rating offered in this 1550-gallon double wall vertical configuration - there is no higher-density step-up for this size, so if your fluid is denser than 1.9 SG, confirm fit with us before you order. Cross-check your chemical's specific gravity at your actual storage concentration and temperature against the 1.9 rating first.
Chemical compatibility
This is an HDLPE (high density linear polyethylene) resin tank rated to 1.9 specific gravity, suitable for a wide range of concentrated chemicals when the fittings and gaskets are matched to the fluid. The single most common mistake on a chemical install is mismatching the gasket elastomer, so think in three tiers: EPDM is the default for most salts, bases, and glycols; Viton is required for oxidizers and strong acids; and peracetic acid steps up further to Aflas. Two fluids also demand metal rather than plastic fittings - DEF and peracetic acid both call for 316 stainless steel, a real sourcing and cost difference worth catching before you plumb. Always verify against the OEM chemical-resistance chart at your specific concentration and temperature, since compatibility shifts with both. Documented compatible chemicals, with recommended 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
- 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
Confirm every fitting and gasket against the Chemical Compatibility Database for your exact service before plumbing the tank. No factory fitting package is preset for this SKU - bulkhead fittings, gaskets, and the rest of the plumbing layout are specified to order, so confirm your configuration with us by phone.
Sizing and double wall containment
For SPCC-regulated sites the integral secondary wall is the whole point of a Snyder Captor-style double wall vessel - it provides built-in spill containment in a single delivered unit. Our Snyder Captor double-wall SPCC 40 CFR 112 compliance walkthrough explains how that containment factors into your plan. If you are still settling on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match this vertical storage tank to your throughput, and our tank level gauge selection guide for chemical service covers monitoring options for dense fluids. Note that some other 1550-gallon vertical models use a taller, narrower 87 x 67 footprint - this unit is 76 x 76 x 136, so size your pad off these dimensions, not a different model's.
Freight and ordering
This double wall tank ships LTL freight from the Snyder plant in Philippi, West Virginia, with the rate quoted live to your ZIP code - we never bury freight in the list price. Get an exact number with the Freight Cost Estimator, or call us at 866-418-1777 to confirm fittings, lead time, and delivery for your double wall vertical storage tank. Have your storage chemical, concentration, and specific gravity ready so we can confirm the 1.9 SG rating and the right fitting and gasket materials for your application before you order.
