The Enduraplas 800 Gallon White Horizontal Sump Bottom Leg Tank (SKU THD00800W) is an 800-gallon polyethylene horizontal leg tank built for transport and field use. It measures 94 inches long by 60 inches wide by 55 inches high, with a 60.0 x 94.0 inch footprint that sits low and stable on a trailer or skid. The sump bottom is designed to draw down to a low point, and the integrated legs let it ride flat without a separate cradle. As an Enduraplas horizontal leg tank, it carries a 1.9 specific gravity rating, which is the figure that decides what you can safely haul in it.
Will it work for your load?
Full of water, this tank weighs about 6,672 pounds. Its maximum rated contents weight is 12,677 pounds, which reflects the 1.9 specific gravity rating, the heaviest density the tank wall is built to carry. That 1.9 rating is the strongest offered for this configuration, so if your fluid runs heavier than roughly 15.8 pounds per gallon you reduce the fill volume rather than reach for a different tank. To check your own load, multiply your fluid's weight per gallon by the gallons you intend to fill and keep that number under the rated contents weight; the Tank Sizing Calculator and Tank Sizing Guide walk through that math. Confirm the leg spacing and outlet locations against the technical drawing on this page before you mount it. For mobile agricultural use, the trailer and DOT classification details in our leg tanks for fertilizer guide and the portable utility tank classification guide explain the 49 CFR scope.
Chemical compatibility
This tank is polyethylene with a 1.9 specific gravity rating that gives real headroom for dense fluids. Linear and cross-linked polyethylene resist chemicals differently, so confirm the exact resin grade (HDLPE versus XLPE) with us at 866-418-1777 before committing this tank to any aggressive chemical service. The pairings below are starting points at ambient temperature; rising temperature narrows compatibility, and the right gasket matters as much as the fitting because the gasket fails long before the tank wall does. Most services run on PVC fittings with EPDM gaskets. The aggressive oxidizers and strong acids need Viton, peracetic acid needs Aflas, and two services need stainless: DEF and peracetic acid both call for 316SS fittings, not the brass or carbon steel commonly found on trailers.
EPDM gasket services (PVC, PP, or stainless fittings as noted):
- Acetic Acid at 60% with PP/PVC fittings
- Aluminum Sulfate at 50% with PVC fittings
- Calcium Chloride at 40% with PVC fittings
- DEF at 32.5% with 316SS fittings
- Ethylene Glycol at 100% with PVC fittings
- Ferric Chloride at 50% with PVC fittings
- Ferric Sulfate at 60% with PVC fittings
- Ferrous Sulfate at 20% with PVC fittings
- Magnesium Chloride at 30% with PVC fittings
- Polyaluminum Chloride with PVC fittings
- Potassium Carbonate at 50% with PVC fittings
- Potassium Hydroxide at saturated concentration with PVC fittings
- Propylene Glycol with PP/316SS fittings
- Sodium Bisulfate with PVC/PP fittings
- Sodium Bisulfite with PVC/PP fittings
- Sodium Carbonate at 30% with PVC fittings
- Sodium Thiosulfate at 40% with PVC fittings
- Urea Solution at 50% with PP/PVC fittings
- Zinc Orthophosphate with PP/316SS fittings
- Ozonated Water up to 10 PPM with PVC fittings
Viton gasket services (stronger acids and oxidizers):
- Hydrochloric Acid at 37% with PVC fittings
- Hydrofluoric Acid at 48% with PP/PVC fittings
- Hydrofluosilicic Acid at 26% with PP/PVC fittings
- Hydrogen Peroxide at 50% with PVC fittings
- Phosphoric Acid at 85% with PVC fittings
- Sodium Hypochlorite at under 16.5% with PVC fittings
- Sulfuric Acid at 98% with CPVC fittings (not standard PVC)
Aflas gasket service:
- Peracetic Acid at 30% with 316SS fittings
Match the fitting and gasket material to the exact chemical and concentration you run, and cross-check every selection against the OEM chemical-resistance chart for your temperature. Start at our chemical compatibility reference for the full picture.
The mistake to avoid
The single most common error on a horizontal leg tank is filling it with a fluid denser than its 1.9 specific gravity rating allows. Sodium hypochlorite, DEF, glycols, and brines all push past the weight of water, and on a moving trailer a sloshing overweight load stresses the legs and sump. Run the numbers against the 12,677-pound rated contents weight first, confirm the resin grade before any aggressive chemical service, and match your hardware to the chart above; the wrong gasket or a brass fitting on a DEF line fails long before the polyethylene does.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, with the rate quoted live to your ZIP code. Get your exact number from the Freight Cost Estimator or call us at 866-418-1777, and we will help you confirm fittings, sizing, and the best way to set it on your trailer or skid.
