The Snyder 1550 Gallon Vertical Double Wall XLPE Liquid Chemical Storage Tank is built for outdoor chemical service where a primary tank and an integral secondary containment basin replace a separate dike. The shell is molded from cross-linked polyethylene (XLPE), rated to a specific gravity of 1.9, so it carries dense liquids that a standard 1.5 SG tank cannot legally hold. Empty footprint is 76 in by 76 in with an overall height of 136 in. Filled with water this vertical tank carries about 12,927 lb, and at its full 1.9 SG rating the contents can reach roughly 24,561 lb - plan the pad, anchoring, and forklift or crane access around the loaded figure, not the empty weight.
Will this double wall tank work for your application?
The double wall design nests a primary chemical tank inside a secondary containment wall, giving you built-in spill protection for SPCC and 40 CFR 112 sites without pouring concrete. Factory fittings shown on the technical drawing on this page include a flange, an 18" PE threaded/vented fitting, and a manway with 15" access for inspection, cleaning, and gauge mounting. The 1.9 SG rating makes this a strong fit for bulk DEF (32.5%) and urea solution (50%) dispensing as well as heavier chemical duty, where the XLPE shell and double-wall containment exceed what a single-wall vertical storage tank offers. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm 1550 gallons matches your batch and refill cycle, and review the technical drawing on this page for exact fitting locations and elevations before you plumb. If your project is containment-driven, the Snyder Captor double-wall SPCC walkthrough covers how these vertical storage tanks satisfy the rule. If you instead need single-wall or a lower SG rating, compare the 1550-gallon natural-white guides for part 42595 and part 40235.
Chemical compatibility
This is a cross-linked polyethylene (XLPE) tank rated to 1.9 specific gravity - the highest standard SG rating, which covers virtually all of the listed chemicals at full liquid density, so there is no need to upsize the tank's SG. Always check the OEM chemical-resistance chart for your exact concentration and operating temperature before committing the tank to service - resistance is concentration- and temperature-specific, and the right fitting and gasket materials matter as much as the resin. At the listed conditions this XLPE / 1.9 SG tank handles acetic acid (60%), aluminum sulfate (50%), calcium chloride (40%), DEF (32.5%), ethylene glycol (100%), ferric chloride (50%), ferric sulfate (60%), ferrous sulfate (20%), hydrofluosilicic acid (26%), magnesium chloride (30%), polyaluminum chloride, potassium carbonate (50%), potassium hydroxide (saturated), propylene glycol, sodium carbonate (30%), sodium thiosulfate (40%), urea solution (50%), and ozonated water (up to 10 PPM). Fitting and gasket pairings from the chart group as follows:
- PVC fittings with EPDM gaskets: aluminum sulfate, calcium chloride, ethylene glycol, ferric chloride, ferric sulfate, ferrous sulfate, magnesium chloride, polyaluminum chloride, potassium carbonate, potassium hydroxide, sodium carbonate, sodium thiosulfate, ozonated water
- PP/PVC fittings with EPDM gaskets: acetic acid, urea solution
- PP/PVC fittings with Viton gaskets: hydrofluosilicic acid
- 316SS fittings with EPDM gaskets: DEF
- PP/316SS fittings with EPDM gaskets: propylene glycol
Confirm each chemical on its page - acetic acid, aluminum sulfate, calcium chloride, DEF, ethylene glycol, ferric chloride, ferric sulfate, ferrous sulfate, hydrofluosilicic acid, magnesium chloride, polyaluminum chloride, potassium carbonate, potassium hydroxide, propylene glycol, sodium carbonate, sodium thiosulfate, urea solution - and browse the full Chemical Compatibility Database.
The mistake to avoid
The costly error on a double wall XLPE chemical tank is matching the resin to your chemical but skipping the fitting and gasket. EPDM gaskets work across most of the list above, but hydrofluosilicic acid at 26% requires Viton - install EPDM there and the seal degrades. Likewise, DEF (32.5%) is sensitive to wetted metals and is specified with 316SS fittings and EPDM gaskets, so do not substitute a plain steel or brass fitting. Ozonated water is an oxidizer and is rated only up to 10 PPM here, so do not exceed that concentration. Match resin, SG, fitting material, and gasket together for the specific chemical and concentration you are storing.
This tank ships LTL from the Snyder plant in Philippi, West Virginia, with freight quoted live to your ZIP - get your number on the Freight Cost Estimator or call 866-418-1777. Because the loaded weight runs into the tens of thousands of pounds, confirm forklift capacity and a level, engineered pad before delivery. For instrumentation, the level gauge selection guide for chemical service walks through radar, ultrasonic, hydrostatic, and magnetostrictive options for this kind of vertical double wall tank.
