The Chem-Tainer 85 Gallon HDPE Horizontal Leg Tank (SKU TC3055LA) is a horizontal leg tank built for haul-and-dispense work where the load has to ride low and sit stable. It holds 85 gallons in a 58-inch-long body that stands 28 inches tall and 24 inches wide, with legs that keep the footprint to 24 x 58 inches. The natural white polyethylene shell carries a 1.9 specific gravity rating, which is why this body suits dense agricultural and chemical liquids rather than plain water alone. One thing to flag up front: this unit ships from Keaau, HI, so island-origin LTL is a real cost driver - price your freight before you commit (more on that below).
Does it work for your job?
Sizing is where horizontal leg tanks get people. Filled with water this tank carries about 709 lb; filled to its maximum rated contents the body is engineered to hold roughly 1,347 lb. That spread matters: the 1.9 SG rating is what lets you put a liquid heavier than water in it, but your trailer, skid, or truck bed has to be rated for the loaded weight, not the dry tank. Measure your mounting surface against the 24 x 58 inch footprint before you buy, and confirm the leg spacing lands on your cross-members. For help matching gallons to your route and refill cadence, run the Tank Sizing Calculator or read the Tank Sizing Guide. If you are outfitting a fertilizer or nurse-trailer setup, the guides on applicator and leg tanks for fertilizer and portable utility tanks and the agricultural exemption walk through the DOT classification questions that decide how you can legally run a horizontal HDPE leg tank on the road.
Chemical compatibility
This is a polyethylene tank with a 1.9 specific-gravity rating. The source data lists the resin as HDLPE but flags it as unconfirmed, so confirm whether your tank is HDLPE versus XLPE (crosslinked) before committing it to chemical service, since the two resins resist different families of chemicals. Always verify against the OEM chemical-resistance chart for your exact concentration and operating temperature - compatibility is concentration- and temperature-specific, and the fitting and gasket material listed below is part of the rated system, not a suggestion.
At the concentrations rated for this resin, the body handles a broad acid, salt, glycol, and hypochlorite range, including Acetic Acid 60% (PP/PVC fittings, EPDM gaskets), Aluminum Sulfate 50%, Calcium Chloride 40%, DEF 32.5% (316SS fittings, EPDM), Ethylene Glycol 100%, Ferric Chloride 50%, Ferric Sulfate 60%, Ferrous Sulfate 20%, Hydrochloric Acid 37% (PVC, Viton), Hydrofluoric Acid 48% (PP/PVC, Viton), Hydrofluosilicic Acid 26%, Hydrogen Peroxide 50% (PVC, Viton), Magnesium Chloride 30%, Peracetic Acid 30% (316SS, Aflas), Phosphoric Acid 85%, Polyaluminum Chloride, Potassium Carbonate 50%, Potassium Hydroxide (saturated), Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Carbonate 30%, Sodium Hypochlorite below 16.5% (PVC, Viton), Sodium Thiosulfate 40%, Urea Solution 50%, Zinc Orthophosphate, and Ozonated Water up to 10 PPM (PVC, EPDM). Concentrated Sulfuric Acid 98% is its own call-out: it requires CPVC fittings with Viton gaskets, not the PVC used for the milder acids - do not let that spec blend in if you are running concentrated sulfuric. More broadly, watch how the gasket shifts - EPDM for the salts and glycols, Viton for the strong oxidizers and concentrated acids, Aflas for peracetic acid - so match the elastomer to the chemical, not just the fitting. For the full picture, cross-check every chemical against our chemical compatibility resource.
The mistake to avoid
The 1.9 SG rating is not a license to skip the math. People see "1.9" and assume the tank handles anything; what it actually means is the wall is built for a contents density up to about 1.9 times water - so a near-full load of a heavy salt brine or sulfuric acid can approach the 1,347 lb max rated figure and will punish an undersized trailer or mount. Spec your fittings and gaskets off the table above for your specific chemical and concentration, and if you cannot confirm HDLPE versus XLPE for your unit, call before you fill it.
This tank ships LTL from Chem-Tainer's plant in Keaau, HI, and freight is quoted live to your ZIP - get your number with the Freight Cost Estimator or call 866-418-1777. Our team can confirm the resin, fitting package, and mounting details for your application before the tank goes on the truck.
