The Enduraplas 100 Gallon Green Horizontal Sump Bottom Leg Tank is a 100-gallon polyethylene tank built for transport and field use, riding on molded legs with a sump bottom that drains toward the outlet. It measures 46 inches long by 41 inches wide by 27 inches tall, sits on a 41.0 x 46.0 inch footprint, and carries a 1.9 specific gravity rating, high enough to haul dense agricultural and industrial liquids rather than just water. If you have been searching for a 100 gallon horizontal leg tank from Enduraplas, this is the unit, molded in green polyethylene with the low center of gravity these horizontal leg tanks are known for.
Will it work for your load?
Sizing is where leg tanks catch people out, so run the numbers before you commit. Filled with water, this 100-gallon tank weighs about 834 lb. The 1.9 SG rating sets the structural ceiling: 834 lb at 1.0 specific gravity multiplied by 1.9 lands at roughly 1,585 lb of rated contents. That headroom is what lets you put a 1.9 specific-gravity liquid in it instead of being capped at water weight. Match the 1,585 lb figure to your trailer, skid, or truck-deck rating, and confirm your tie-down points handle a full tank in motion. The 27-inch height keeps the loaded weight low, which helps on rough ground. Use the Tank Sizing Calculator to convert your liquid's weight per gallon into a fill limit, and the Tank Sizing Guide if you are choosing between leg-tank sizes.
Chemical compatibility
This is a polyethylene tank with a 1.9 specific gravity rating. The resin is recorded as HDLPE in our data but carries a question mark, so before you put any chemical in this tank, confirm with us whether the build is HDLPE or XLPE (cross-linked) by calling 866-418-1777. That distinction governs which chemicals it can safely hold. Always size the tank to the liquid's specific gravity, and verify the fitting and gasket materials below against the OEM chemical-resistance chart at your exact concentration and temperature, since compatibility is concentration- and temperature-specific.
At the concentrations and SG this tank supports, the chart lists the chemicals below. Note the fitting and gasket call-outs shift by chemical: the salts and glycols run on PVC with EPDM gaskets, while the strong acids, hydrogen peroxide, and sodium hypochlorite want Viton or Aflas and, in places, CPVC or 316 stainless. Order fittings to the row, not to the tank.
| Chemical | Max conc. | Fitting | Gasket |
|---|---|---|---|
| Acetic Acid | 60% | PP/PVC | EPDM |
| Aluminum Sulfate | 50% | PVC | EPDM |
| Calcium Chloride | 40% | PVC | EPDM |
| DEF | 32.5% | 316SS | EPDM |
| Ethylene Glycol | 100% | PVC | EPDM |
| Ferric Chloride | 50% | PVC | EPDM |
| Ferric Sulfate | 60% | PVC | EPDM |
| Ferrous Sulfate | 20% | PVC | EPDM |
| Hydrochloric Acid | 37% | PVC | Viton |
| Hydrofluoric Acid | 48% | PP/PVC | Viton |
| Hydrofluosilicic Acid | 26% | PP/PVC | Viton |
| Hydrogen Peroxide | 50% | PVC | Viton |
| Magnesium Chloride | 30% | PVC | EPDM |
| Peracetic Acid | 30% | 316SS | Aflas |
| Phosphoric Acid | 85% | PVC | Viton |
| Polyaluminum Chloride | Not specified - confirm before ordering | PVC | EPDM |
| Potassium Carbonate | 50% | PVC | EPDM |
| Potassium Hydroxide | Saturated | PVC | EPDM |
| Propylene Glycol | Not specified - confirm before ordering | PP/316SS | EPDM |
| Sodium Bisulfate | Not specified - confirm before ordering | PVC/PP | EPDM |
| Sodium Bisulfite | Not specified - confirm before ordering | PVC/PP | EPDM |
| Sodium Carbonate | 30% | PVC | EPDM |
| Sodium Hypochlorite | Under 16.5% | PVC | Viton |
| Sodium Thiosulfate | 40% | PVC | EPDM |
| Sulfuric Acid | 98% | CPVC | Viton |
| Urea Solution | 50% | PP/PVC | EPDM |
| Zinc Orthophosphate | Not specified - confirm before ordering | PP/316SS | EPDM |
| Ozonated Water (reference only) | Up to 10 PPM | PVC | EPDM |
See the full chemical compatibility resources before ordering fittings, and read the row for your exact chemical and concentration rather than assuming the tank covers every strength.
The mistake to avoid
The most common error on a 1.9-rated leg tank is treating the SG rating as a fill ceiling for any liquid. The 1,585 lb figure assumes a contents density at or below 1.9 specific gravity, so put something heavier in it, or fill past the marked line, and you are loading the legs and the trailer beyond their design. Pair that with the resin question above: do not run an aggressive chemical until the HDLPE-versus-XLPE build is confirmed and your fittings and gaskets match the chart for that exact chemical and concentration.
This tank ships LTL freight from the plant in Neche, ND, with the rate quoted live to your ZIP code. Get your number from the Freight Cost Estimator or call 866-418-1777. For application context, see our guides on applicator and leg tanks for fertilizer, portable utility tanks and DOT classification, and fertilizer-blend tank stratification. You can also check the technical drawing on this page for fitting locations and dimensions.
