The Norwesco 225 Gallon Plastic Chemical Injection Tank is a specialty injection tank molded in High Density Linear Polyethylene with a 1.5 specific gravity rating, built to hold 225 gallons of chemical in a compact 38-by-52-inch footprint. The white HDLPE shell stands 42 inches tall, clearing most low-bay injection skids and metering-pump stations. For multi-tank arrays or pump sizing against pad loads, the Tank Sizing Calculator and Tank Sizing Guide work through the numbers fast.
Will it hold your chemical?
Filled with plain water this tank carries roughly 1,876 lb; at the 1.5 specific gravity it is rated for, contents can weigh up to about 2,815 lb. That difference is the number that catches people: a denser-than-water chemical loads the shell, the fittings, and the pad far harder than a water-weight estimate suggests. Size the foundation and any saddle or skid to the rated 2,815 lb contents weight, not the water figure, and lay the 38.0 x 52.0 footprint fully supported on a flat, level pad with no overhang under the wall.
Chemical compatibility
This is a High Density Linear Polyethylene (HDLPE) shell — linear, not cross-linked — rated to 1.5 specific gravity. The linear-versus-cross-linked resin distinction matters in chemical service, so cross-check your chemical against the resistance chart rather than assuming any polyethylene tank handles it. At the 1.5 rating, the OEM chemical-resistance chart supports the following common chemicals (compatibility is always concentration- and temperature-specific, so verify against the chart and your operating temperature):
- Acetic Acid at 60% — PP or PVC fittings, EPDM gaskets
- Aluminum Sulfate at 50% — PVC fittings, EPDM gaskets
- Calcium Chloride at 40% — PVC fittings, EPDM gaskets
- DEF at 32.5% — 316SS fittings, EPDM gaskets
- Ferrous Sulfate at 20% — PVC fittings, EPDM gaskets
- Magnesium Chloride at 30% — PVC fittings, EPDM gaskets
- Sodium Carbonate at 30% — PVC fittings, EPDM gaskets
- Urea Solution at 50% — PP or PVC fittings, EPDM gaskets
- Ozonated Water up to 10 PPM — PVC fittings, EPDM gaskets
Match the fitting and gasket material to the chemical, not just the tank: an EPDM gasket that is right for sodium carbonate is wrong for an oxidizer like sodium hypochlorite or hydrogen peroxide, which want Viton, and peracetic acid demands 316SS fittings with an Aflas gasket. The DEF entry above is the same 32.5% urea solution used in diesel emissions systems — 316SS wetted parts, EPDM seals.
What this tank cannot hold at 1.5 SG
Several chemicals buyers ask about for injection service need a higher 1.9 specific gravity tank, not this one — running them in a 1.5 SG shell is the most common and most expensive mistake on a tank this size. Those include Sulfuric Acid (CPVC fittings, Viton gaskets), Sodium Hypochlorite (PVC, Viton), Hydrogen Peroxide (PVC, Viton), Peracetic Acid (316SS, Aflas), Ferric Chloride, Ferric Sulfate, Hydrochloric Acid (PVC, Viton), Hydrofluoric Acid (PP/PVC, Viton), Hydrofluosilicic Acid (PP/PVC, Viton), Phosphoric Acid (PVC, Viton), Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Sodium Bisulfate, Sodium Bisulfite, Sodium Thiosulfate, Ethylene Glycol, Propylene Glycol, and Zinc Orthophosphate. If your service appears on this list, do not order this 1.5 SG tank — step up to the 1.9 SG version, and call 866-418-1777 so we confirm the right rating before you buy. Cross-check every chemical against the full Chemical Compatibility Database, and lay out vent, fill, level, and drain penetrations using our top fitting placement strategy so an EPDM line and a Viton line never share the wrong port.
Specifying and monitoring it
When you set this Norwesco chemical tank up for bulk storage, plan instrumentation and labeling alongside the plumbing. Our guides on tank level gauge selection for chemical service, tank label and signage compliance, and chemical sampling protocol cover the gauge, placard, and sampling decisions this tank size tends to involve. See the technical drawing on this page for fitting locations and overall dimensions before you finalize the layout.
This Norwesco tank ships LTL freight from the nearest plant — either Marked Tree, AR or Shawnee, OK — with the rate quoted live to your ZIP, and at up to 2,815 lb loaded the empty shell still palletizes cleanly for a standard LTL pickup. Get a freight number in seconds with the Freight Cost Estimator, or call 866-418-1777 and we will confirm the right specific-gravity rating, fitting package, and freight for your application.
