The Norwesco 125 Gallon Plastic Chemical Injection Tank (SKU N-63880) is a white, high density linear polyethylene (HDLPE) tank rated to 1.5 specific gravity for metered chemical feed and bulk storage. It stands 36 inches tall on a 32 in by 44 in footprint. Full of plain water at 125 gallons, contents weigh about 1,042 lb; loaded with the densest chemical it is rated for, contents reach roughly 1,564 lb. This is a Norwesco specialty chemical tank, and the spread between those two numbers is exactly why specific gravity matters here.
Will this Norwesco chemical tank work for my application?
Size your pad, anchoring, and any saddle or stand to the 1,564 lb max-rated contents figure, not the water number, or the support will be undersized. Confirm the 32 in by 44 in footprint and the 36 in height against your containment area and your pump-mount height before ordering. For sizing help, run the Tank Sizing Calculator or read the Tank Sizing Guide. The technical drawing on this page shows the dimensional detail and fitting locations to verify against your plumbing.
Chemical compatibility
This tank is molded from HDLPE and rated to 1.5 specific gravity. At that resin and rating, the chemical-resistance data lists it as compatible with the following, at the concentrations shown. Always verify against the OEM chemical-resistance chart for your exact concentration and operating temperature, and match the fitting and gasket materials listed for each chemical, because a wrong gasket fails long before the tank wall does.
| Chemical | Max Conc. | Fitting | Gasket |
|---|---|---|---|
| Acetic Acid | 60% | PP/PVC | EPDM |
| Aluminum Sulfate | 50% | PVC | EPDM |
| Calcium Chloride | 40% | PVC | EPDM |
| DEF | 32.5% | 316SS | EPDM |
| Ferrous Sulfate | 20% | PVC | EPDM |
| Magnesium Chloride | 30% | PVC | EPDM |
| Sodium Carbonate | 30% | PVC | EPDM |
| Urea Solution | 50% | PP/PVC | EPDM |
| Ozonated Water | up to 10 PPM | PVC | EPDM |
One to watch: DEF (diesel exhaust fluid) at 32.5% is compatible here, but it is the only chemical on this list that calls for 316 stainless steel fittings rather than plastic. Spec the 316SS, not PVC, on a DEF build.
Several common feed chemicals are NOT safe in this 1.5 SG tank and need the 1.9 specific gravity version of this Norwesco chemical injection tank instead: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Peracetic Acid, Phosphoric Acid, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite, Sodium Thiosulfate, Sulfuric Acid, and Zinc Orthophosphate. If your chemistry is on that list, confirm the 1.9 SG tank on our Chemical Compatibility Database before ordering.
The mistake to avoid
The number one error on a chemical injection tank this size is matching specific gravity wrong. This is a 1.5 SG tank. Heavier acids and oxidizers such as sulfuric, hydrochloric, phosphoric, and sodium hypochlorite require the 1.9 SG version; putting them in a 1.5 SG wall shortens its life and risks failure. The second error is gasket selection. The compatible chemicals above run on EPDM, but several of the 1.9 SG chemicals do not: hydrochloric acid, hydrogen peroxide, sodium hypochlorite, sulfuric acid, and phosphoric acid call for Viton, and peracetic acid calls for Aflas, not EPDM. Pair the right resin and elastomer with the right instrumentation; our guide on level gauge selection for chemical service covers radar versus ultrasonic versus hydrostatic versus magnetostrictive choices. If this tank sits in a bunded area, the secondary containment volume math guide and the tank labeling and signage compliance guide keep your install inspection-ready, and the chemical sampling protocol guide helps you monitor what is actually in the tank.
This Norwesco 125 gallon chemical tank ships LTL freight, quoted live to your ZIP from the nearest stocking plant in Marked Tree, AR or Shawnee, OK. Get a real number in seconds with our Freight Cost Estimator, or call 866-418-1777 to talk through sizing, fittings, and chemical service with a person. Listed price is before freight.
