The Enduraplas 3500 Gallon Yellow Horizontal Leg Tank (SKU THF03500Y) is a polyethylene horizontal leg tank built to haul dense liquid in the field, measuring 70 in high by 95 in wide and 179 in long on a 95.0 x 179.0 in footprint. The molded legs cradle the tank for transport on a skid, sled, or trailer, and the 1.9 specific gravity rating is what separates this unit from a general-purpose water tank: it is engineered to carry heavy product, not just water. If you have been searching enduraplas, horizontal tank, or leg tank options in yellow, this is the high-density haul end of that range.
Will it work for your job
Capacity is 3,500 gallons. At full water the tank carries 29,190 lb of contents, and it is rated to a maximum contents weight of 55,461 lb at its 1.9 specific gravity ceiling. That spread is the whole point of a 1.9 SG tank, and it is also where buyers get caught: a 1.9 SG product fills this tank to its weight ceiling at full volume, so anything denser must be loaded short of the top. For lighter fertilizer blends you fill to full volume with margin to spare. Run your gallons and product density against the 1.9 rating and the 55,461 lb max before you load, then confirm the legs, saddle, and your transport setup carry the loaded weight. Use the Tank Sizing Calculator and the Tank Sizing Guide to match gallons and density to the tank.
Fittings and plumbing
Fitting size, location, and count are configuration-dependent on this unit, so confirm the exact fitting package before you order: call 866-418-1777, and review the technical drawing on this page as a reference. Before you commit to a fitting kit, read the wetted-material guidance below, because the right fitting size means nothing if the material is wrong for your product.
Chemical compatibility
This is a polyethylene tank with a 1.9 specific gravity rating. The resin grade is recorded as HDLPE but is not yet confirmed, so confirm HDLPE versus XLPE with us before putting this tank into chemical service. One read on wetted materials before the list: most products here run PVC fittings with EPDM gaskets, but the oxidizers and strong acids require Viton (hydrochloric, hydrogen peroxide, sodium hypochlorite, phosphoric, sulfuric), and a few demand exotic seats you cannot improvise in the field. DEF, propylene glycol, and zinc orthophosphate call for 316 stainless, peracetic acid needs 316 stainless with Aflas, and sulfuric acid at 98% needs CPVC rather than PVC. The chemicals below are compatible per the OEM chemical-resistance chart at the listed concentrations; that chart is concentration- and temperature-specific, so match your exact product strength and service temperature before committing.
- 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
For the full picture, see our chemical compatibility resource and match concentration and temperature to your application.
The mistake to avoid
The most expensive error on a 1.9 SG haul tank is loading it like a water tank. Do not treat the 29,190 lb full-water figure as your limit; it is not. Your real ceiling is the 55,461 lb max-rated contents weight, and it holds only at or below the 1.9 specific gravity rating. Push past that density and you are outside the tank's design. Just as important, confirm the resin (HDLPE versus XLPE) and lock in the correct fitting and gasket materials from the chart above for your specific product, because the wrong wetted material can fail long before the polyethylene does. For agricultural haul and applicator context, our guides on applicator and leg tanks for fertilizer, loaf-style portable utility tanks and the 49 CFR agricultural exemption, and fertilizer-blend tank stratification walk through the regulatory scope and field practices that keep a horizontal leg tank running on spec.
This yellow horizontal leg tank ships LTL freight from the plant in Neche, ND, quoted live to your ZIP. Get an exact number from our Freight Cost Estimator or call 866-418-1777 for a quote and to confirm resin and fittings before you order.
