The Snyder Industries 6500 Gallon 30 Degree Plastic Cone Bottom Tank (SKU SII-7180000N43) is a 6,500-gallon white polyethylene cone tank built for full-drain batching, mixing, and chemical storage where you need every gallon to clear the outlet. It stands 273 inches tall on a 90 x 90-inch footprint, carries a 1.5 specific gravity rating, and arrives configured with a flange, an 18-inch PE threaded/vented top fitting, and a manway with 15-inch access. The 30-degree cone bottom moves settling solids and viscous product toward the drain instead of leaving residue on a flat floor.
Will it handle your batch and your chemical?
The 1.5 SG rating is the number to size against. At a full water load this tank carries 54,210 lb, and at its maximum rated contents it carries 81,315 lb. Stay at or below the 1.5 SG ceiling: multiply your fluid's specific gravity by the water weight to confirm you are inside the rating before you fill. Because this is a cone bottom on a 90 x 90-inch footprint reaching 273 inches in height, plan for an engineered cone-bottom stand rated to the loaded weight, full vertical clearance for the manway and the 18-inch vented top fitting, and bottom support that carries the cone without point-loading the discharge. The manway with 15-inch access is your only entry for internal cleanout and inspection between product changes, so plan your batch-cleaning routine around it. See the technical drawing on this page for the fitting layout and dimensional callouts, and use the Tank Sizing Calculator and Tank Sizing Guide to confirm capacity and footprint against your pad.
Don't cap the vent
The mistake that wrecks a cone tank: never plug or cap the 18-inch vented top fitting. A 6,500-gallon cone drains fast, and a sealed top will pull a vacuum that can collapse the wall. Keep the vent free-flowing every time you fill or drain.
Chemical compatibility
This tank is rated at 1.5 specific gravity. The resin is listed as HDLPE but is unconfirmed in our source data - confirm whether your unit is HDLPE or XLPE with us before chemical service, because crosslinked polyethylene resists some chemicals that linear polyethylene does not. Compatibility below is built from the OEM chemical-resistance chart, which is concentration- and temperature-specific; always verify your exact concentration and operating temperature against that chart. Every chemical compatible at this tank's 1.5 SG rating uses EPDM gaskets paired with PVC, PP, or 316SS fittings - match your fitting and gasket kit to the chemical you run.
Compatible at this tank's 1.5 SG rating, with the recommended fitting and gasket materials:
- Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
- Calcium Chloride (40%) - PVC fittings, EPDM gaskets
- DEF (32.5%) - 316SS fittings (not PVC), EPDM gaskets
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
One exception worth catching before you order: DEF (diesel exhaust fluid) is the only in-rating chemical here that requires 316SS fittings rather than PVC or PP - EPDM gaskets are fine. If you are storing DEF, spec the stainless fittings up front.
The heavier-chemical mistake to avoid: do not store a high-gravity chemical in a 1.5 SG tank. Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Peracetic Acid, Phosphoric Acid, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite, Sodium Thiosulfate, Sulfuric Acid, and Zinc Orthophosphate all require a 1.9 SG-rated tank - this 1.5 SG unit is not the right vessel for them, and several of those call for Viton or Aflas gaskets rather than EPDM. Need to store sulfuric acid, sodium hypochlorite, or another of these? Ask us about the 1.9 SG-rated version of this cone - call 866-418-1777. Confirm the chemical, concentration, and required SG on our Chemical Compatibility Database before you commit.
Freight and ordering
This Snyder cone bottom tank ships by LTL freight from the Snyder plant in Lincoln, Nebraska, quoted live to your ZIP. Cone bottom tanks are tall, single-piece freight, so get an accurate number before you buy with our Freight Cost Estimator, and have a forklift or crane and an engineered stand ready at delivery. For help matching the cone angle and stand to your process, read our Cone Bottom Tank Stand Compatibility Matrix and the cone-bottom buyer's guide on 15 vs 30 vs 45 degree selection. For high-hazard chemical service that needs secondary containment, see our Snyder Captor Plus 110% containment vs UL-142 and SPCC comparison. Questions on fittings, SG, or freight? Call 866-418-1777.
