The Snyder Industries 5500 Gallon HDPE Vertical Chemical Storage Tank is built for bulk chemical service, rated to a 1.9 specific gravity so it carries the heaviest aqueous chemistries this footprint is designed to hold. It stands 132 inches tall on a 120-inch diameter base, giving a 120.0 x 120.0 footprint, and is molded in white polyethylene from one of two Snyder plants. If you are sizing a vertical storage tank for a treatment plant, process line, or bulk chemical room, this is the large-capacity Snyder HDPE vertical tank in that class, and at 1.9 SG it is the heaviest-rated shell available in the 5500 gallon, 120-inch class, so correct sizing comes from your actual fluid SG, not from buying up to a heavier tank.
Will it work for your application
Filled with water this tank carries 45,870 lb; at its 1.9 SG rating the maximum rated contents weight is 87,153 lb. Your real loaded weight scales linearly with your fluid's specific gravity, so a 1.5 SG chemical lands near 68,800 lb, and your pad, anchoring, and forklift access must be rated to that SG-adjusted figure, not to water and not to the 1.9 ceiling. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm capacity and weight against your draw rate and refill schedule. Outlet, manway, and fitting sizes are not pre-configured in this listing, so confirm thread or flange size and bulkhead placement with us before ordering hardware; the locations are shown on the technical drawing on this page, which you should review against your plumbing and gauge layout before you build the connections.
Chemical compatibility
This tank is molded in polyethylene and carries a 1.9 specific gravity rating. The resin family is not fully confirmed in our data, and because standard HDPE verticals generally top out near 1.5 SG, a 1.9 rating points to a crosslinked shell; confirm HDLPE versus XLPE with us before committing this tank to chemical service. All compatibility below is concentration- and temperature-specific per the OEM chemical-resistance chart, so always verify your exact concentration and operating temperature, and match the fitting and gasket material to your chemical, not just the tank.
Group your hardware selection by gasket and fitting tier:
- PVC fitting with EPDM gasket (the default slate): aluminum sulfate (50%), calcium chloride (40%), ethylene glycol (100%), ferric chloride (50%), ferric sulfate (60%), ferrous sulfate (20%), magnesium chloride (30%), polyaluminum chloride, potassium carbonate (50%), potassium hydroxide (saturated), sodium carbonate (30%), sodium thiosulfate (40%), and ozonated water (up to 10 PPM). Acetic acid (60%) and urea solution (50%) use PP or PVC fittings with EPDM, and sodium bisulfate and sodium bisulfite use PVC or PP fittings with EPDM.
- Viton gasket (oxidizers and strong acids): hydrochloric acid (37%) on PVC, hydrofluoric acid (48%) and hydrofluosilicic acid (26%) on PP or PVC, hydrogen peroxide (50%) on PVC, phosphoric acid (85%) on PVC, sodium hypochlorite (<16.5%) on PVC, and sulfuric acid (98%), which specifically calls for CPVC fittings.
- Specialty metal fittings: DEF (32.5%) and zinc orthophosphate use 316 stainless with EPDM (zinc orthophosphate may also use PP), propylene glycol uses PP or 316SS with EPDM, and peracetic acid (30%) requires 316 stainless fittings with an Aflas gasket.
See the full Chemical Compatibility Database for the concentration- and temperature-specific detail before ordering hardware.
The mistake to avoid
The error that ruins a chemical tank install is specifying the shell correctly and then bolting on the wrong fittings and gaskets. A 1.9 SG polyethylene tank can hold a heavy acid, but a stock EPDM gasket on a sodium hypochlorite or hydrogen peroxide outlet will fail in service. Choose your fitting material and gasket from the tiers above, confirm the resin family with us before chemical service, and pair the tank with the right instrumentation, as covered in our guides on level gauge selection for chemical service and label and signage compliance. If you are building a containment plan, compare approaches in our Snyder Captor Plus 110% containment vs UL-142 SPCC writeup, and review your chemical sampling protocol before commissioning.
This tank ships LTL freight from the nearest Snyder plant in our network, either Lincoln, NE or Philippi, WV, with the rate quoted live to your ZIP. Get your number on the Freight Cost Estimator or call 866-418-1777 to confirm fittings, resin family, and delivery before you order.
