The Snyder Industries 400 Gallon HDPE Vertical Chemical Storage Tank in White is built for bulk chemical service, molded from high density linear polyethylene to a 1.9 specific gravity rating - the high-SG construction you need when the contents weigh substantially more than water. This vertical tank stands 64 inches tall on a 45 by 45 inch square footprint and holds 400 gallons. Sized to its 1.9 rating it carries up to 6,338 pounds of contents, versus 3,336 pounds full of plain water. That spread is the whole reason this tank exists: pick it when your fluid is heavier than water, and treat 1.9 SG as the ceiling-grade choice for the densest acids and brines.
Specifications and fittings
This Snyder vertical storage tank ships from the factory with a molded flange, an 18-inch PE threaded/vented fitting, a 6-inch by 8-inch fitting, and a manway for interior access and inspection. Those ports come with the tank; the wetted fitting and gasket materials are a spec you select to match your chemistry, not parts included in the box. Confirm the exact ports against the technical drawing on this page before you plumb - the drawing shows placement and elevation for each. Use the Tank Sizing Calculator and Tank Sizing Guide to check the 400-gallon working volume and the loaded weight against your pad and secondary containment before ordering.
Chemical compatibility
This tank is HDLPE rated to 1.9 specific gravity. Compatibility always depends on concentration and temperature, so verify your exact chemistry against the OEM chemical-resistance chart and our Chemical Compatibility Database. Within its rating this tank is documented for strong acids and oxidizers including sulfuric acid at 98% (CPVC fittings, Viton gaskets), hydrochloric acid at 37% (PVC, Viton), phosphoric acid at 85% (PVC, Viton), hydrofluoric acid at 48% (PP/PVC, Viton), hydrofluosilicic acid at 26% (PP/PVC, Viton), sodium hypochlorite below 16.5% (PVC, Viton), and hydrogen peroxide at 50% (PVC, Viton). It also handles the water-treatment coagulant and salt lineup: ferric chloride at 50%, ferric sulfate at 60%, ferrous sulfate at 20%, aluminum sulfate at 50%, polyaluminum chloride, calcium chloride at 40%, magnesium chloride at 30%, sodium carbonate at 30%, potassium carbonate at 50%, potassium hydroxide at saturation, sodium bisulfite, sodium bisulfate, sodium thiosulfate at 40%, and zinc orthophosphate (PVC or PVC/PP fittings, EPDM gaskets on these). For fluids stations and fleet yards it is documented for DEF at 32.5% and urea solution at 50%, along with ethylene glycol and acetic acid at 60%, plus peracetic acid at 30% and ozonated water up to 10 PPM.
Here is the mistake that ruins a chemical tank: the gasket and fitting material matter as much as the resin, and they change by chemical. This tank wants Viton on the strong oxidizers and acids (sulfuric, hydrochloric, phosphoric, hydrofluoric, peroxide, hypochlorite), EPDM on the salts and glycols, 316 stainless on DEF, and a less common Aflas gasket on peracetic acid - Aflas is the one call buyers get wrong because it is unusual, so spec it deliberately. Do not assume one gasket fits all, and confirm whether your build is HDLPE versus XLPE before chemical service if there is any doubt about the resin.
Freight
This Snyder vertical chemical tank ships LTL freight from the Lincoln, Nebraska plant, quoted live to your ZIP code - there is no flat shipping rate on a tank this size. It ships empty and dry, so the 64 by 45 by 45 inch envelope and the dry tank weight drive the LTL class and the forklift and pallet planning - the 6,338 pound figure is rated contents at 1.9 SG, not shipping weight. Get a number before you commit using the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. For the hardware around a bulk chemical install, see our guides on level gauge selection for chemical service, label and signage compliance, and chemical sampling protocol. Questions on whether this Snyder 400-gallon HDPE vertical fits your chemistry? Call 866-418-1777.
