The Chem-Tainer 125 Gallon Horizontal Leg Tank (SKU TC2948LC) is a saddle-style horizontal tank molded in natural white polyethylene, built to ride on a trailer or skid and move liquid down the road or across the yard - water, fertilizer blends, and DEF (diesel exhaust fluid) being the common haul loads. It measures 50 inches long by 28.75 inches wide by 31.5 inches tall, holds a nominal 125 gallons, and carries a 1.5 specific gravity rating, the number that tells you how heavy a liquid this tank is engineered to hold. Integrally molded support legs give the cylinder a flat, stable footprint of 28.75 x 50.0 inches so it rides level without a full cradle. If you are deciding between this and a larger or smaller horizontal leg tank, run your volume through the Tank Sizing Calculator or the Tank Sizing Guide before you commit.
Will it handle your load?
The 1.5 SG rating is the governing spec here. Filled with plain water (specific gravity 1.0), 125 gallons weighs about 1,042 pounds. The tank wall is rated to carry contents up to roughly 1,564 pounds, which is what the 1.5 rating buys you: headroom for liquids denser than water. Match your actual product's specific gravity against that 1.5 ceiling before you fill. Water, fertilizer blends, DEF, and most field chemicals fall under it, but heavier acids and brines do not (see the chemical compatibility section below). Because this is a transport-oriented horizontal leg tank, secure it properly and never run it partially full at highway speed without baffled restraint - liquid surge in a half-empty horizontal cylinder is the classic mistake that shifts load and stresses the legs.
Chemical compatibility
This tank is molded in polyethylene with a 1.5 specific gravity rating. The resin grade in our data is recorded as HDLPE but not fully confirmed - before putting any chemical in this tank, confirm whether your unit is HDLPE or XLPE (cross-linked), because the two resins do not share identical chemical resistance. Always size the tank's SG rating to your chemical, and verify every selection against the manufacturer's chemical-resistance chart, which is concentration- and temperature-specific.
At this tank's 1.5 SG rating, the following are compatible at the listed concentrations, with the recommended fitting and gasket materials:
- 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
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
Several common chemicals are NOT recommended in this 1.5 SG tank and require a heavier 1.9 specific gravity tank instead. Note that some of these also demand non-standard gaskets - watch the elastomer, not just the SG rating: Sulfuric Acid (CPVC fittings, Viton gasket), Sodium Hypochlorite (PVC, Viton), Hydrochloric Acid (PVC, Viton), Hydrofluoric Acid (PP/PVC, Viton), Hydrofluosilicic Acid (PP/PVC, Viton), Hydrogen Peroxide (PVC, Viton), Phosphoric Acid (PVC, Viton), and Peracetic Acid (316SS, Aflas). The remaining 1.9-SG chemicals run on EPDM gaskets: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Thiosulfate, and Zinc Orthophosphate. If your application involves any of these, step up to a 1.9 SG Chem-Tainer leg tank or call us at 866-418-1777 and we will spec the correct tank and elastomer. Browse the full chemical compatibility reference for concentration- and temperature-specific guidance.
Freight and ordering
This tank ships LTL freight from the Chem-Tainer plant in Merced, CA, quoted live to your ZIP code. Plant location is your single biggest freight variable, so West Coast buyers will see the friendliest rates - pair the Merced origin with the empty-and-full weights above (about 1,042 lb of water, up to 1,564 lb of rated contents) and run the Freight Cost Estimator to self-qualify LTL cost before you buy, or call 866-418-1777 for help spec'ing fittings and confirming resin. Review the technical drawing on this page for fitting locations and exact dimensions before you order. For application background on horizontal and leg-style transport tanks, see our guides on applicator and leg tanks for fertilizer and portable utility tank DOT classification, and if you are blending fertilizer, our breakdown of fertilizer-blend tank stratification.
