The Snyder Industries 120 Gallon Vertical Double Wall Waste Oil Tank is a self-contained primary-plus-secondary system built for indoor and outdoor used-oil collection, waste-fluid storage, and spill-contained chemical service where a separate berm or dike is impractical. The yellow polyethylene tank stands 51 inches tall on a 34 x 34 inch footprint, so the entire double wall assembly fits inside a tight mechanical room, shop bay, or fluid-handling station while the integrated outer wall holds spill containment without a poured curb. It carries a 1.5 specific gravity rating, the same Snyder double wall vertical platform our customers search for when they want an oil tank with built-in secondary containment rather than a single wall drum.
Will it work for your fluid and your space
This 120 gallon Snyder ships with a 2-inch bulkhead fitting (Banjo TF220PE) and a 14-inch hinged, lockable polypropylene manway, so you get a secured top opening for filling, sampling, and access right out of the box. Plan your loads against weight, not just volume: filled with water this tank carries about 1,001 pounds, and at its 1.5 specific gravity rating it is engineered for contents up to roughly 1,501 pounds. That means your slab or floor needs to carry about 1,500 pounds on a 34 x 34 inch footprint, roughly 190 pounds per square foot, a number worth handing to your structural reviewer before you set the tank. Waste oil sits well under the weight ceiling, which is why the 1.5 SG wall is the right match here, but confirm the density of whatever you store stays inside the rating before you fill. Use our Tank Sizing Calculator and the Tank Sizing Guide to match capacity, footprint, and loaded weight to your slab, and review the technical drawing on this page for fitting locations and secondary-wall geometry before you set anchors or plumb the outlet.
Chemical compatibility
This tank is molded polyethylene with a 1.5 specific gravity rating. The resin is recorded as HDLPE but flagged as unconfirmed, so verify HDLPE versus crosslinked (XLPE) construction with us before committing this tank to chemical service. At the 1.5 SG rating, the OEM chemical-resistance chart supports the following, always per the chart's concentration and temperature notes: Acetic Acid at 60% (PP/PVC fittings), Aluminum Sulfate at 50% (PVC), Calcium Chloride at 40% (PVC), DEF at 32.5% (316SS fittings), Ferrous Sulfate at 20% (PVC), Magnesium Chloride at 30% (PVC), Sodium Carbonate at 30% (PVC), Urea Solution at 50% (PP/PVC), and Ozonated Water up to 10 PPM (PVC). The convenient part for sealing: every chemical on this 1.5 SG list uses EPDM gaskets, so one EPDM seal kit covers the whole compatible set. The stock PP manway already matches the chart's fitting recommendations for most of these, but the 2-inch Banjo bulkhead is the fitting to verify or swap for your fluid, since the chart calls for PVC on most chemistries and 316SS on DEF. Match fitting and gasket material to your exact chemical and concentration and confirm it on the OEM chemical-resistance chart, and see the Acetic Acid page and our full chemical compatibility reference for details.
The 1.5 SG mistake to avoid
The most common error on a double wall tank like this is overrunning the specific gravity. This 1.5 SG wall is correct for waste oil and the chemicals above, but several heavier chemistries require a 1.9 specific gravity tank, not this one. Storing Sulfuric Acid (CPVC fittings, Viton gaskets), Hydrochloric Acid (PVC, Viton), Phosphoric Acid (PVC, Viton), Sodium Hypochlorite (PVC, Viton), Hydrogen Peroxide (PVC, Viton), Ferric Chloride (PVC, EPDM), Ethylene Glycol (PVC, EPDM), Potassium Hydroxide (PVC, EPDM), Peracetic Acid (316SS, Aflas), or Polyaluminum Chloride (PVC, EPDM)? You need the 1.9 specific gravity version of this Snyder double-wall platform, not this 1.5 SG tank. Note that the seal kit escalates too: several of those heavier acids and oxidizers call for Viton rather than EPDM, and Peracetic Acid needs Aflas, so it is a different wall and a different gasket. Do not put a 1.9 SG chemical in this 1.5 SG tank. Call 866-418-1777 and we will spec the right one. If you are storing used oil for SPCC purposes, the built-in double wall handles secondary containment, but read our walkthroughs on Snyder Captor double-wall tanks for SPCC 40 CFR 112, RCRA 40 CFR 264.193 secondary containment, the 110% containment versus UL-142 comparison, and freeboard sizing per ASTM D1998 to confirm your usable volume and inspection cadence.
This tank ships LTL freight from the Snyder plant in Marked Tree, AR, with cost quoted live to your ZIP code. Get your number with our Freight Cost Estimator, or call 866-418-1777 to confirm fittings, specific gravity, and delivery before you order.
