The Enduraplas 1600 Gallon Black Horizontal Sump Bottom Leg Tank ships as a polyethylene horizontal leg tank on a frame, rated to a 1.9 specific gravity. This is a haul-and-dispense unit: at 60 in. high, 71 in. wide, and 130 in. long on a 71 x 130 in. footprint, it sits low and stable on its legs and frame the way a tall vertical never could on a transport skid. The black resin blocks light to slow algae growth, and the sump-bottom design (per the product name) lets the outlet pull from the lowest point so the tank drains nearer to empty between loads, leaving less product heel behind and less dead tare weight on the next leg. Because it ships LTL from a single Enduraplas plant in Neche, ND, your distance from that plant drives the freight number, so get a real figure with the Freight Cost Estimator before you commit.
Will it hold your load?
Full of water (8.34 lb/gal), 1600 gallons weighs about 13,344 lb. The 1.9 specific gravity rating raises the ceiling to a 25,354 lb maximum rated contents weight, so the tank can carry liquids nearly twice the density of water up to that limit. At 1.9 SG this sits at the top of the density range, so there is no heavier-rated step-up to chase. Confirm your actual product's specific gravity against the 1.9 rating before filling, and size your frame, trailer, and tie-downs to the loaded weight, not the empty tank. The Tank Sizing Calculator and Tank Sizing Guide walk through capacity and weight planning for a horizontal tank like this one.
Chemical compatibility
The tank resin reads as HDLPE but is not fully confirmed, so verify HDLPE versus XLPE with the manufacturer before any chemical service. Against a concentration- and temperature-specific OEM chemical-resistance chart, the following are compatible at the listed strengths with the listed 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
- 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
Match the gasket material to the chemical exactly. Most salts, glycols, and DEF on this list run EPDM, but the oxidizers and strong acids - sodium hypochlorite, hydrogen peroxide, hydrochloric acid, hydrofluoric acid, phosphoric acid, and sulfuric acid - require Viton, and peracetic acid requires Aflas. EPDM will fail on those. The wrong elastomer is the most common reason a chemically compatible tank still leaks at the bulkhead. Full concentration and temperature limits live on the OEM chemical-resistance chart and our chemical compatibility reference.
Mistake to avoid
The big one on a 1.9 SG tank is treating the rating as a license to fill to the brim with any heavy liquid. The 25,354 lb maximum rated contents weight is a hard ceiling, not a target, and the gasket split above is not optional. Confirm your product's specific gravity, concentration, and the correct elastomer against the 1.9 rating before you commit. For DOT and field-handling context on this style of tank, see our guides on applicator and leg tanks for fertilizer, portable utility tanks and 49 CFR 173.5, and fertilizer-blend tank stratification.
This tank ships LTL from the Enduraplas plant in Neche, ND, with freight quoted live to your ZIP. Fitting sizes and locations are shown on the technical drawing on this page and confirmed at order. Get an exact freight figure with our Freight Cost Estimator, or call 866-418-1777 to lock in your order.
