The Enduraplas 300 Gallon Yellow Horizontal Leg Tank (SKU THF00300Y) is a 300-gallon polyethylene haul tank built for moving liquid loads on a skid, trailer, or truck bed, with a 1.9 specific-gravity rating that lets it carry dense ag and water-treatment chemistries, not just water. It measures 74 inches long, 46 inches wide, and 31 inches tall, riding on integrally molded legs that keep it stable in transit. This is the tank people search for as an enduraplas horizontal leg tank, a 300 gallon horizontal tank for haul duty.
Will it work for your load?
Start with weight, because that is what decides your trailer and mounting. Filled with water this tank carries roughly 2,502 lb of contents; at its full 1.9 SG rating it is engineered for up to about 4,754 lb of contents. Size your trailer axles, tie-downs, and pump around the heavier number if you plan to haul dense product - that 4,754 lb figure is what makes heavy chemistries like 98% sulfuric acid or 85% phosphoric acid workable in this tank, so do the math against your rig before you load. Run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide. The 46 x 74 inch footprint and 31-inch height fit most utility trailers and flatbeds. Because this is a transport tank, secure the full load and never travel with a partially filled, unbaffled leg tank - slosh on a half-full leg tank is the most common haul mistake. One more check before you order: this tank's port count and thread sizes are not listed in our spec data, so confirm them on the technical drawing or by phone before buying bulkheads, valves, or pump fittings to match.
Chemical compatibility
This tank is molded from polyethylene with a 1.9 specific-gravity rating, which is why it spans water-treatment and ag chemistries that a 1.0 or 1.5 SG tank cannot safely hold at full volume. At 1.9 SG this is already the densest-rated poly haul tank we carry, so there is no higher-SG poly upgrade to step up to - if your product runs heavier than 1.9 SG you are outside poly territory and should call us first. One honest caveat: confirm the exact resin (linear versus cross-linked polyethylene) before committing it to aggressive chemical service, since cross-linked and linear polyethylene resist different chemistries. Match your fittings and gaskets to the product, and always verify against the OEM chemical-resistance chart at your exact concentration and temperature - compatibility is concentration- and temperature-specific.
From the compatibility data for this tank, common haul-and-store chemistries include Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS fittings, 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 (PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (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), and Zinc Orthophosphate (PP/316SS, EPDM); Ozonated Water (up to 10 PPM, PVC, EPDM) is also rated, with its dedicated page pending. Read the fitting and gasket callouts closely - several of these need Viton or Aflas gaskets and stainless, CPVC, or PP fittings rather than standard EPDM and PVC, and matching them correctly is the difference between a tank that lasts and one that weeps at the bulkhead. Full charts and per-chemical notes live on the chemical compatibility hub.
Specs and drawing
For port locations, leg placement, and exact dimensions, see the technical drawing on this page. For dense-product haulers, also review our guides on applicator and leg tanks for fertilizer, portable utility tanks and 49 CFR 173.5 farm exemptions, and fertilizer-blend tank stratification.
This tank ships LTL from Neche, ND, with freight quoted live to your ZIP. Get an exact number with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and help confirm the right fittings and gaskets for your chemistry before it leaves the plant.
