The Norwesco 2635 Gallon Horizontal Elliptical Leg Tank is a heavy-haul transport tank molded from high density linear polyethylene in blue, built for moving large volumes of dense agricultural and industrial liquid by trailer. The elliptical cross-section sits low and wide on integrated legs, with a 90-inch by 140-inch footprint and a 72-inch overall height. It carries a 1.9 specific gravity rating, which is what lets it haul heavy liquids rather than just water. If you have searched for a Norwesco horizontal leg tank or an HDPE horizontal tank in this size class, this is the full 2,635-gallon horizontal transport tank.
Will this tank handle my load?
Sizing is where leg tanks get misjudged, so work from the weights. Filled with water this tank carries 21,976 pounds of contents; at its 1.9 specific gravity rating the maximum rated contents weight climbs to 41,754 pounds. That near-21-ton figure is the number your trailer, axles, and hitch have to be engineered around. Run those numbers through the Tank Sizing Calculator and the Tank Sizing Guide before you spec a chassis, because the difference between a water load and a dense-fertilizer load on this tank is nearly 20,000 pounds. See the technical drawing on this page for the dimensioned outline and leg layout. One thing to confirm before you order: outlet and fitting configuration is not specified in our catalog data for this SKU, so do not assume a particular bulkhead or port ships standard. Call us to lock down the fitting layout for your service.
Chemical compatibility
This is an HDLPE tank rated to 1.9 specific gravity, which is Norwesco's heaviest-duty leg-tank rating; there is no denser-rated step-up for this size, so 1.9 is your ceiling. That rating makes it suitable for a wide range of dense agricultural and water-treatment chemistries when fitted and gasketed correctly, and "correctly" varies by chemical: the data below spans EPDM, Viton, and Aflas gaskets, plus metal-only cases where DEF and peracetic acid both require 316 stainless hardware. This is not a one-gasket tank. Compatibility is always concentration- and temperature-specific, so confirm your exact service against the OEM chemical-resistance chart and our individual chemical compatibility pages before filling. Representative chemicals this resin and SG rating support include:
- Acetic Acid (60%) — PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) — PVC fittings, EPDM gaskets
- Calcium Chloride (40%) — PVC fittings, EPDM gaskets
- DEF (32.5%) — 316SS fittings, EPDM gaskets
- Ethylene Glycol (100%) — PVC fittings, EPDM gaskets
- Ferric Chloride (50%) — PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) — PVC fittings, EPDM gaskets
- Ferrous Sulfate (20%) — PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) — PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) — PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid (26%) — PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) — PVC fittings, Viton gaskets
- Magnesium Chloride (30%) — PVC fittings, EPDM gaskets
- Peracetic Acid (30%) — 316SS fittings, Aflas gaskets
- Phosphoric Acid (85%) — PVC fittings, Viton gaskets
- Polyaluminum Chloride — PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) — PVC fittings, EPDM gaskets
- Potassium Hydroxide (saturated) — PVC fittings, EPDM gaskets
- Propylene Glycol — PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate — PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite — PVC/PP fittings, EPDM gaskets
- Sodium Carbonate (30%) — PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) — PVC fittings, Viton gaskets
- Sodium Thiosulfate (40%) — PVC fittings, EPDM gaskets
- Sulfuric Acid (98%) — CPVC fittings, Viton gaskets
- Urea Solution (50%) — PP/PVC fittings, EPDM gaskets
- Zinc Orthophosphate — PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) — PVC fittings, EPDM gaskets (no dedicated page yet; see the chemical compatibility index)
The mistake to avoid
Match the fitting and gasket material to the chemical, not to the tank. The polyethylene shell tolerates many of these chemistries, but the wrong gasket fails first: aggressive oxidizers and acids like sulfuric acid, hydrochloric acid, hydrogen peroxide, and sodium hypochlorite call for Viton or CPVC hardware, peracetic acid needs Aflas, and DEF requires 316 stainless. Because outlet and fitting hardware is not specified in catalog data for this SKU, do not assume a Viton-ready or stainless bulkhead ships standard — confirm hardware per the chart above for your exact concentration before you fill. For transport-specific regulatory context, review our guides on applicator and leg tanks for fertilizer and DOT/NRT scope, the 49 CFR 173.5 agricultural exemption, and fertilizer-blend stratification and mixing protocol.
This tank ships LTL freight, quoted live to your ZIP. Norwesco molds across multiple plants — Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Shawnee, OK; St. Bonifacius, MN; and Tooele, UT — and we ship from the one nearest you. On a near-21-ton dense load, origin selection is the single biggest LTL cost lever, so run your ZIP against the in-region origins with our Freight Cost Estimator or call 866-418-1777 to confirm fittings, lead time, and delivery to your site.
