The Snyder Industries 550 Gallon Vertical Chemical Storage Tank (SKU 1800000N52) is a white polyethylene vertical tank built for bulk liquid storage where chemical resistance matters. It holds 550 gallons in a 48-inch diameter footprint standing 75 inches tall, weighs 110 lb empty, and carries an 18-inch lid for access. This unit ships without a fitting, so you spec the bulkhead, outlet, and gasket to match your chemistry. The tank is rated to a 1.9 specific gravity and a maximum contents temperature of 120 F / 48 C, and it carries Snyder certifications 2285 and 2282.
Will it work for your chemical
Start with the specific gravity math. This tank is rated for contents up to 1.9 SG, which is why heavy chemistries fit here that would exceed a standard 1.5 SG water tank. At 550 gallons of plain water the tank carries about 4,587 lb; loaded to its full 1.9 rating the contents reach roughly 8,715 lb, so your pad, anchoring, and floor loading must be engineered for that weight, not the empty 110 lb. The 48-inch diameter base gives you the stable vertical footprint for a tank this tall. One thing worth knowing up front: 1.9 is the top of Snyder's SG scale for this tank, so for the heaviest chemistries there is no heavier tank to step up to — do not undersize your SG expectations assuming a "safer" upgrade exists later. Confirm your exact contents against the OEM chart before ordering, and use the technical drawing on this page to verify dimensions and the 18-inch lid opening against your fill and vent layout.
Chemical compatibility
This is an HDLPE tank (the resin is marked with a "?"), so confirm HDLPE versus XLPE with us before committing it to chemical service, since crosslinked and linear polyethylene behave differently with aggressive chemistries. The tank is rated to 1.9 SG and is listed against 28 chemistries on the Snyder Industries OEM chemical resistance chart, which is concentration- and temperature-specific — verify your exact concentration, temperature, and the correct fitting and gasket materials before you buy. Those chemistries fall into required-SG tiers: light-duty services like DEF (32.5%, 316SS, EPDM) and Urea Solution (50%, PP/PVC, EPDM) need only 1.35 SG; a middle cluster needs 1.5 SG; and the aggressive acids and oxidizers need the full 1.9 rating this tank provides. Because 1.9 over-satisfies the lighter tiers, this tank carries real margin on those services.
Chemistries this 1.9 SG tank can handle include Hydrochloric Acid (37%, PVC fittings, Viton gasket), Sulfuric Acid (98%, CPVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Phosphoric Acid (85%, PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Sodium Hypochlorite (up to 16.5%, PVC, Viton), Peracetic Acid (30%, 316SS, Aflas), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ethylene Glycol (100%, PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Sodium Thiosulfate (40%, PVC, EPDM), Polyaluminum Chloride (PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate and Sodium Bisulfite (PVC/PP, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). The lower-SG chemistries also fit with margin — Acetic Acid (60%, PP/PVC, EPDM), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), Magnesium Chloride (30%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), and Sodium Carbonate (30%, PVC, EPDM). See our full Chemical Compatibility Database to confirm your exact service conditions.
The mistake to avoid
The gasket and fitting material is where these installs go wrong. Notice the pattern above: oxidizers and strong acids — sodium hypochlorite, sulfuric, hydrochloric, hydrogen peroxide, peracetic acid — call for Viton or Aflas gaskets, not the EPDM that works for salts and glycols. And some services rule out plastic fitting bodies entirely: DEF and peracetic acid require metal 316SS bodies, while propylene glycol and zinc orthophosphate list PP/316SS. Because this tank ships without a fitting, an EPDM gasket or a PVC body bought by default will fail fast on a service that demands Viton, Aflas, or 316SS. Match the fitting body (PVC, CPVC, PP, or 316SS) and the gasket to your specific chemistry before you order the bulkhead. One more caveat: the 120 F / 48 C rating is the tank's ceiling, not a per-chemical guarantee — several chemistries, sodium hypochlorite among them, have a maximum working temperature well below that, so read the temperature column on the OEM chart for your exact chemical. Getting your fill, vent, and drain layout right the first time also matters — our guide on tank top fitting placement strategy walks through it, and if you are adding a level gauge, see our level gauge selection guide. For hazard labeling once the tank is in service, review tank label and signage compliance.
This 550 gallon Snyder vertical ships LTL freight from the nearest Snyder plant — Arkansas, Nebraska, or West Virginia — with freight quoted live to your ZIP through our Freight Cost Estimator. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm this is the right vertical for your volume, and call 866-418-1777 to spec fittings and gaskets to your chemistry before you order.
