The Snyder Industries 535 Gallon Plastic Horizontal Leg Tank is a polyethylene horizontal leg tank built for hauling and dispensing on a trailer or skid. It holds 535 gallons, measures 78 inches long by 47 inches wide by 52 inches high, and carries a 1.9 specific gravity rating - which is why this tank fits fertilizer and chemical nurse-rig builds where the liquid is denser than plain water. Check the technical drawing on this page for fitting locations and molded leg detail before you finalize a build.
Will it work for your job
The integrated molded legs give the tank a stable 47.0 x 78.0 inch footprint so it sits flat on a trailer deck or pickup bed without a separate cradle. Full of plain water the tank and contents weigh about 4,462 pounds. The 1.9 SG rating is the ceiling: this tank is engineered to carry up to roughly 8,478 pounds of contents at 1.9 specific gravity, and liquids denser than that exceed its design - treat 8,478 pounds as a hard limit, not a target to push past. That rating is the whole point of a 1.9 tank: it lets you fill all 535 gallons with a heavy liquid fertilizer or solution instead of leaving capacity on the table to stay under the weight limit. Size the load against your trailer's axle and tire ratings using the Tank Sizing Calculator and the Tank Sizing Guide before you spec fittings.
Chemical compatibility
This tank is molded polyethylene with a 1.9 specific gravity rating. The resin is recorded as HDLPE but flagged unconfirmed - confirm HDLPE versus XLPE with us before putting this tank into chemical service, because the two crosslink differently and that distinction gates both the SG headroom and the acid and oxidizer compatibility below. The fittings and gaskets named for each chemical are the materials you need to source - no fittings are recorded as shipping with this tank, so the PVC, EPDM, Viton, 316SS, CPVC and Aflas calls below are a buy list, not what is pre-installed. Every entry is concentration- and temperature-specific; match your exact concentration and service temperature. DEF (32.5%) is a clean fit and a common haul load, but it needs 316SS fittings and EPDM gaskets - not PVC - so do not carry it over from a water build. Other strong matches for a 1.9 SG horizontal include Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), Magnesium Chloride (30%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM) and Urea Solution (50%, PP/PVC, EPDM). Acids generally need Viton gaskets - Hydrochloric Acid (37%, PVC, Viton), Phosphoric Acid (85%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton) and Sulfuric Acid (98%, CPVC, Viton) - as do Sodium Hypochlorite (under 16.5%, PVC, Viton) and Hydrogen Peroxide (50%, PVC, Viton). Aggressive oxidizers such as Peracetic Acid (30%) call for 316SS fittings with Aflas gaskets. Other charted matches include Acetic Acid (60%, PP/PVC, EPDM), Ferric Sulfate (60%), Ferrous Sulfate (20%), Ethylene Glycol (100%), Propylene Glycol, Sodium Carbonate (30%), Potassium Carbonate (50%), Potassium Hydroxide (saturated), Sodium Bisulfate, Sodium Bisulfite, Sodium Thiosulfate (40%), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Polyaluminum Chloride and Zinc Orthophosphate; ozonated water up to 10 PPM is also charted. Verify every selection against our chemical compatibility reference, which is concentration- and temperature-specific, before ordering.
Avoid the costly mistake
The single most expensive mistake on a leg tank like this is ordering fittings and gaskets off habit instead of off the data. The polyethylene wall handles a dense liquid at 1.9 SG, but the fitting and gasket are what weep or fail first - matching DEF or peracetic-acid duty to PVC and EPDM when the data calls for 316SS, or skipping Viton on an acid, will leak long before the tank wall ever does. Confirm the resin is HDLPE versus XLPE, confirm your concentration and temperature, then source fittings and gaskets to match the materials shown above - none of them ship with the tank, so build that into your order.
This Snyder Industries 535 gallon horizontal leg tank ships LTL freight from Marked Tree, AR, quoted live to your ZIP. Get a freight estimate with our Freight Cost Estimator or call 866-418-1777, and if you are building a fertilizer nurse rig the applicator and leg tank guide, the fertilizer-blend stratification guide and the SPCC double-wall walkthrough are worth a read before you finalize the build.
