The Enduraplas 1600 Gallon Black Horizontal Sump Bottom Leg Tank (SKU THD01600B) is a 1,600-gallon transport-style polyethylene tank built to ride low and haul heavy. At 130 inches long, 71 inches wide, and 59 inches tall, it sits on a horizontal leg-tank footprint of 71.0 x 130.0 inches, with a sump bottom that drains toward the tank's low point so you can pull product down to the last usable inches. The black polyethylene wall blocks UV and light to slow algae growth and resist sun degradation across long outdoor and over-the-road duty cycles. This is the tank operators search for as a horizontal leg tank, a black horizontal Enduraplas tank, or simply a horizontal haul tank.
Will it work for your job
Sizing comes down to weight, and weight is where leg tanks catch people out. Filled with water this tank carries 13,344 lb of contents; rated to its 1.9 specific-gravity ceiling it can hold up to 25,354 lb of denser product. That 1.9 SG rating is the heaviest class in poly tanks - it already covers the dense fertilizers and brines that would exceed a 1.5-SG tank, so you are not shopping for anything stronger. Before you fill, confirm the rated axle and frame capacity of whatever trailer, skid, or pickup deck you mount it on covers that loaded figure, and match your transfer pump and plumbing to a horizontal sump-bottom drain. To work the math for your own product density, run the Tank Sizing Calculator and review the Tank Sizing Guide before you commit a fill. For dimensions and the molded-in fitting locations, see the technical drawing on this page, or call 866-418-1777 and we will confirm the fitting layout for your build.
Chemical compatibility - confirm the resin first
This tank is recorded as molded in high-density polyethylene (HDLPE) and carries a 1.9 specific-gravity rating, so it has the wall mass for dense liquids. The resin grade is the one open question on this tank, and for chemical service it is the most important one: confirm HDLPE versus crosslinked (XLPE) with us at 866-418-1777 before you put anything aggressive in it, because the two resins behave differently against the same media. Always size the contents against the 1.9 SG ceiling, and match fitting and gasket material to your exact chemical and concentration.
Watch the fitting metal - most of the chemistries below run on PVC fittings with EPDM gaskets, but several break that default and drive your fitting budget. DEF (32.5%) and Peracetic Acid (30%) require 316 stainless steel fittings, and the strong acids require Viton or CPVC instead of PVC: Hydrochloric Acid (37%, PVC/Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Phosphoric Acid (85%, PVC, Viton), Sodium Hypochlorite (<16.5%, PVC, Viton), and Sulfuric Acid (98%, CPVC, Viton). Peracetic Acid pairs 316SS with an Aflas gasket. Budget for stainless or Viton on those before you price the kit.
On the standard PVC/EPDM default, this tank suits a wide range of fertilizer, water-treatment, and de-icing chemistries per the Enduraplas chemical-resistance chart, which is concentration- and temperature-specific: Acetic Acid (60%, PP/PVC, EPDM), Aluminum Sulfate (50%), Calcium Chloride (40%), Ethylene Glycol (100%), Ferric Chloride (50%), Ferric Sulfate (60%), Ferrous Sulfate (20%), Magnesium Chloride (30%), Polyaluminum Chloride, Potassium Carbonate (50%), Potassium Hydroxide (saturated), Propylene Glycol (PP/316SS), Sodium Bisulfate (PVC/PP), Sodium Bisulfite (PVC/PP), Sodium Carbonate (30%), Sodium Thiosulfate (40%), Urea Solution (50%, PP/PVC), Zinc Orthophosphate (PP/316SS), and Ozonated Water (up to 10 PPM). Verify every selection against the OEM chart at your service temperature, and start at our chemical compatibility hub.
The mistake to avoid
The costly error on a 1.9-SG haul tank is filling to volume instead of to weight. Sixteen hundred gallons of a heavy fertilizer or brine can run far over the 13,344 lb water figure and approach the 25,354 lb rated contents ceiling - enough to overload a trailer or buckle a deck sized for water. Decide your fill by weight, not by gallons, confirm the resin question above before you load anything aggressive, and budget stainless or Viton fittings where the chart calls for them. For the density, blend, and stratification physics behind a heavy fertilizer load, the fertilizer-blend stratification guide walks through mixing and field verification, and for hauling and DOT classification of farm leg and utility tanks, the applicator and leg tank scope guide and the 49 CFR portable utility tank guide explain the rules.
This tank ships LTL freight from Neche, ND, with the rate quoted live to your ZIP code. Get your number now with the Freight Cost Estimator, or call 866-418-1777 and our team will work the freight and fitting package with you.
