The Enduraplas 800 Gallon Black Horizontal Leg Tank (SKU THF00800B) is built for hauling liquid fertilizer, chemical, and water loads on a trailer or skid where the tank rides on its molded legs and stays put under transit. At 800 gallons in a black polyethylene body, it carries a 1.9 specific gravity rating, which is why it can hold heavier-than-water chemistries that lighter-rated tanks cannot. The black resin blocks UV and helps suppress algae growth, a practical advantage over translucent tanks when the contents sit outdoors between runs.
Will this tank work for your load?
The tank measures 94 inches long by 60 inches wide by 48 inches tall, giving a 60.0 x 94.0 inch footprint to design your trailer deck or containment pad around. Plan your structure for weight, not just gallons: full of water this horizontal leg tank weighs about 6,672 lb, and at its 1.9 SG rating the maximum rated contents weight climbs to roughly 12,677 lb. That spread is the whole point of the 1.9 rating, so size your trailer axles, tie-downs, and deck for the heavy figure if you are hauling dense fertilizer blends or chemicals near that gravity, not for the water number. At 1.9 SG this is already the heaviest-duty rating offered, so no higher-gravity tank is needed even for dense fertilizer blends running near that limit. If you are sizing the tank to a job rather than a load weight, the Tank Sizing Calculator and Tank Sizing Guide walk through capacity, footprint, and weight together. Note that fitting and outlet configuration is not published for this SKU, so confirm fill, vent, and discharge sizing against the technical drawing on this page or with us at 866-418-1777 before you plumb it.
Chemical compatibility
This is a polyethylene tank carrying a 1.9 SG rating. The resin grade is recorded as HDLPE but unconfirmed, so verify HDLPE versus XLPE with us before committing it to chemical service, because crosslinked and linear polyethylene behave differently under aggressive chemistries. Compatibility always depends on concentration and temperature, so check the OEM chemical-resistance chart for your exact conditions. At the 1.9 SG rating this tank is rated for a broad range, including acetic acid (60%), aluminum sulfate (50%), calcium chloride (40%), DEF (32.5%), ethylene glycol (100%), ferric chloride (50%), ferric sulfate (60%), ferrous sulfate (20%), hydrochloric acid (37%), hydrofluoric acid (48%), hydrofluosilicic acid (26%), hydrogen peroxide (50%), magnesium chloride (30%), peracetic acid (30%), phosphoric acid (85%), polyaluminum chloride, potassium carbonate (50%), potassium hydroxide (saturated), propylene glycol, sodium bisulfate, sodium bisulfite, sodium carbonate (30%), sodium hypochlorite (under 16.5%), sodium thiosulfate (40%), sulfuric acid (98%), urea solution (50%), zinc orthophosphate, and ozonated water (up to 10 PPM). Match your fittings and gaskets to the fluid: most salts and bases call for PVC fittings with EPDM gaskets, while oxidizers and strong acids such as hydrochloric, hydrofluoric, hydrogen peroxide, phosphoric, and sodium hypochlorite require Viton gaskets. Two chemistries need special hardware that the default PVC/EPDM kit will not cover: peracetic acid (30%) needs 316SS fittings with an Aflas gasket, and concentrated sulfuric acid (98%) needs CPVC fittings with a Viton gasket. For a haul rig, the DEF caveat matters most: DEF (32.5%) and urea solution (50%) both run on EPDM, but DEF specifically requires 316SS fittings, not brass, carbon steel, or standard threaded metal, because the wrong metal contaminates the fluid and fails SCR systems downstream. Note that ozonated-water compatibility (up to 10 PPM) is confirmed by us directly rather than through a standing page, so ask us about that service rather than hunting for a link. Full per-chemical detail lives on our chemical compatibility resource.
Built for the road, not just the tank stand
The horizontal leg design is what separates this from a stationary tank: the integrated legs and low, wide profile keep the center of gravity down so the load stays stable when you tow it. That makes it a working applicator and leg tank for fertilizer and similar field chemistries. Before you put a leg tank on a trailer for road use, understand the DOT classification rules that apply, covered in Applicator and Leg Tanks for Fertilizer: DOT and Non-Roadable Trailer scope and the agricultural-exemption breakdown in 49 CFR 173.5 farm-fleet classification. If you are blending fertilizer in this tank, our guide on blend-tank stratification and mixing protocol covers how to keep a dense blend from salting out and running off-spec.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, the nearest named shipping point, with freight quoted live to your ZIP. Get your freight estimate with the Freight Cost Estimator, or call 866-418-1777 to confirm fittings, the resin grade, and freight before you order.
