The Snyder Industries 500 Gallon Plastic Horizontal Leg Tank (SKU SII-1400100C26) is a white, transport-style leg tank molded from High Density Linear Polyethylene with a 1.9 specific gravity rating - the heaviest-duty resin spec Snyder offers, which is what makes this a true chemical and fertilizer haul tank rather than a water-only vessel. Rated for 500 gallons, it measures 72 inches long, 49 inches wide, and 55 inches high, with the molded legs giving it a stable horizontal footprint of 49 x 72 inches for mounting on a skid, trailer, or pickup bed.
Will this 500 gallon horizontal leg tank work for your job?
Filled with water, this tank carries roughly 4,170 pounds. Because the shell is rated to 1.9 specific gravity, it is engineered to carry contents weighing up to 7,923 pounds - so at the SG ceiling, 500 gallons of liquid runs about 15.8 lb per gallon versus water's 8.34 lb per gallon. Size your mount, axle, and tie-downs to that loaded number, not the 4,170 lb water figure: a fluid near the 1.9 SG ceiling weighs almost double what the same volume of water does. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm gallons and loaded weight before you build the rack. This is the horizontal leg tank format applicators reach for when they need a 500 gallon tank that travels.
Chemical compatibility
This is an HDLPE tank with a 1.9 specific gravity rating. Per the Snyder OEM chemical-resistance chart - which is concentration- and temperature-specific - the following liquids are compatible at the listed concentrations, with the recommended fitting and gasket materials. Match your fitting and gasket to the chemical, since the tank resin is only part of the seal: Acetic Acid 60% (PP/PVC fittings, EPDM gaskets), 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 (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 <16.5% (PVC, Viton), Sodium Thiosulfate 40% (PVC, EPDM), Sulfuric Acid 98% (CPVC, Viton), Urea Solution 50% (PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water up to 10 PPM (PVC, EPDM). Each linked chemical has a dedicated page - see for example sodium hypochlorite, sulfuric acid, DEF, and hydrochloric acid - and the full chemical compatibility resource covers the rest. Verify your exact chemical, concentration, and service temperature against the OEM chart before filling.
The mistake to avoid on a chemical haul tank
The most common error is trusting the tank resin alone and bolting on whatever fittings are on the shelf. On this tank the gasket material changes with the chemical - EPDM for most salts, glycols, and DEF, but Viton for the oxidizers and strong acids (hydrochloric, hydrofluoric, hydrofluosilicic, phosphoric, sulfuric, hydrogen peroxide, sodium hypochlorite). Peracetic acid is the lone Aflas-gasket service on this chart - Viton and EPDM are not substitutes for it. Four services also call for 316 stainless fittings rather than plain PVC: DEF, peracetic acid, propylene glycol, and zinc orthophosphate. Watch the concentration ceilings too - sodium hypochlorite is rated only under 16.5%, ferrous sulfate to 20%, hydrofluosilicic acid to 26%, and ozonated water to 10 PPM; higher strengths fall outside this chart. Confirm the resin is HDLPE for your specific service and match every wetted component to the chemical. For applicator and trailer-mount classification review the applicator and leg tank guide and portable utility tank DOT classification guide, and for fertilizer-blend stratification see the stratification guide. See the technical drawing on this page for fitting locations and exact dimensions.
This tank ships LTL freight from the Snyder plant in Chowchilla, CA, with cost quoted live to your ZIP code. LTL is rated on the empty tank's dimensions - roughly 72 x 49 x 55 inches and a 49 x 72 inch footprint - so have those ready for a faster, more accurate quote. Get a number now with the Freight Cost Estimator or call 866-418-1777. For double-wall containment options under SPCC 40 CFR 112, see the Snyder Captor double-wall walkthrough. Questions about fittings, mounting, or chemical service on this 500 gallon horizontal leg tank? Call us at 866-418-1777.
