The Enduraplas 300 Gallon Green Horizontal Sump Bottom Leg Tank ships with its steel frame, so you can mount it to a trailer or skid and haul liquid in the field without building your own cradle. The polyethylene tank holds 300 gallons, measures 36 in. high by 46 in. wide by 74 in. long, and rides on a 46.0 x 74.0 in. footprint. As the name says, this is a sump-bottom design: the bottom slopes toward a low outlet so the tank drains close to empty between loads, which matters when you switch chemicals and want no heel left behind. The leg-tank profile keeps a moving load stable on the trailer. This is a horizontal leg tank built for transport, not a stationary storage drum.
Will it handle your load?
Run the numbers before you fill it. Plain water at 300 gallons puts roughly 2,502 lb on the frame and mounting points. The tank carries a 1.9 specific gravity rating, which means at the maximum rated content density it can hold up to about 4,754 lb of liquid. That spread matters: a denser ag chemical or fertilizer weighs far more than water at the same volume, so size your trailer, axles, and tie-downs to the heavier figure, not to the water number. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm your fill weight lands inside your rig's rated capacity before you load and roll.
Outlet and fitting configuration
The sump-bottom outlet size, bulkhead fittings, and any pre-installed plumbing are not specified in our data for this tank. Confirm the exact outlet and fitting layout with us at 866-418-1777 before you order or spec a fitting and gasket package. Do not assume what comes pre-installed; we will confirm the configuration against the technical drawing on this page.
Chemical compatibility
This tank is rated to 1.9 specific gravity, and our resin record for it is unverified (listed as HDLPE with a query). Confirm HDLPE versus XLPE, and get the OEM's written resin confirmation and concentration/temperature-specific resistance chart before you put it into chemical service. We do not certify this tank for any specific chemical without that written OEM confirmation. Every fluid below sits at or under the 1.9 SG rating, so the rating itself is the binding ceiling — there is no higher-SG tank substitute for these chemicals in this listing. Note the non-PVC outliers up front: DEF (32.5%) and Peracetic Acid both require 316SS stainless fittings, and Sulfuric Acid at 98% requires CPVC — do not default-spec PVC for these three. The compatible chemicals, with concentration and fitting/gasket pairing, are:
- 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
Verify your exact chemical, concentration, and temperature against the OEM chemical-resistance chart, and see our full chemical compatibility reference before committing a fitting and gasket package.
The mistake to avoid
The single most common error on a haul tank is loading a heavy chemical to the brim using a water-weight estimate. Because this tank is rated to 1.9 specific gravity, the difference between a water fill and a max-density fill is more than 2,200 lb — enough to overload a trailer or shear a mount. Confirm your liquid's specific gravity, multiply it through your fill volume, and stay inside both your tank's rated weight and your trailer's capacity. If you are hauling fertilizer blends, watch for stratification; our guide on fertilizer-blend tank stratification covers the mixing and field-verification steps that catch a salted-out load before the spreader runs off spec. For DOT and non-roadable-trailer scope on transport leg tanks, see our notes on applicator and leg tanks for fertilizer and on portable utility tanks under 49 CFR 173.5.
This 300 gallon horizontal leg tank ships LTL freight from the Enduraplas plant in Neche, ND, with the cost quoted live to your ZIP code. Get your number with our Freight Cost Estimator or call 866-418-1777 to lock in delivery and confirm your outlet and fitting package before you order.
