The Enduraplas 400 Gallon Green Horizontal Leg Tank (SKU THF00400G) is built for the farm, applicator, and chemical-haul jobs where the tank rides low and rated heavy. Molded in green polyethylene with a 1.9 specific gravity rating, this horizontal leg tank holds 400 gallons in a 37 in. tall by 46 in. wide by 74 in. long body, with a 46.0 x 74.0 in. footprint that sits stable on a skid, trailer, or pickup bed. The low 37 in. height keeps the loaded center of gravity down on a trailer or pickup bed, a real stability advantage of the horizontal leg profile over a vertical tank of equal capacity. The 1.9 SG rating is the spec that tells you it can carry far more than water.
Will this tank work for your job?
Water fills this 400-gallon tank to roughly 3,336 lb when full. Because the body is rated to 1.9 specific gravity, the maximum rated contents weight climbs to 6,338 lb, which is the number to plan your trailer, axle, and tie-down rating around before you ever load it. At 1.9 specific gravity this is already the highest-density rating in the line, so there is no heavier-rated equivalent to step up to. Match that weight against your hauling setup using the Tank Sizing Calculator and the Tank Sizing Guide so you size the trailer to the loaded tank, not the empty one. Buyers searching for an Enduraplas horizontal leg tank in the 400 gallon class land here for exactly this combination of low-profile horizontal geometry and a high-density rating. For DEF or urea-solution transport in particular, the leg-tank haul profile pairs with 316SS fittings and EPDM gaskets for DEF at 32.5% and PP/PVC fittings with EPDM gaskets for urea solution at 50%.
Chemical compatibility
This is an HDLPE? tank rated to 1.9 specific gravity, and the resin code is unconfirmed. Confirm HDLPE versus XLPE with us at 866-418-1777 before putting any chemical into chemical service - the wrong resin is the most common and most expensive mistake on a tank like this. Once the resin is confirmed, the body itself handles a wide range of solutions, but the fittings and gaskets must be matched to the chemical and concentration. No fitting package is listed for this tank, so specify your bulkhead and outlet fittings and gaskets per the chemical table below when you order. Always verify against the OEM chemical-resistance chart for your specific concentration and temperature, and see our chemical compatibility resource.
Representative compatible chemicals at the listed concentrations, with the fitting and gasket materials to specify:
- 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
Sizing, hauling, and the mistake to avoid
The single mistake that bites buyers on a horizontal leg tank is treating the 1.9 SG rating as permission to haul anything heavy without checking the loaded weight against the trailer. At 6,338 lb fully loaded with a 1.9 SG product, this tank can outweigh the rig carrying it. Plan the trailer and tie-downs around that figure. For ag applicators weighing leg-tank against loaf-style portable utility tanks, our guides on applicator and leg tanks for fertilizer and loaf-style portable utility tanks and the 49 CFR ag exemption cover the DOT scope; for blend-tank work, see fertilizer-blend tank stratification.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP code. Get a real number with the Freight Cost Estimator or call 866-418-1777 to lock in your order and confirm the resin grade for chemical service before you buy.
