The Enduraplas 7011 Gallon Natural White Cone Bottom Tank is the bulk-volume vessel for full-drain chemical processing, where every gallon has to leave the tank and nothing settles in the bottom. Rated for liquids up to 1.9 specific gravity, this is a true heavy-chemical cone bottom tank built to hold dense solutions that would overstress a water-grade tank. At 7,011 gallons in a 144 x 144 inch footprint and roughly 141 inches tall, it carries enough volume for primary storage, batching, or a settling and draw-off application where the cone geometry does the work of emptying solids and sediment to the outlet.
Will it work for your application?
Start with the 1.9 specific gravity rating, because it sets the ceiling. Full of plain water this tank holds 58,472 pounds; loaded to its maximum rated contents it carries up to 111,096 pounds. That 1.9 SG number is a contents-weight ceiling, not a license to fill to the brim with a dense solution — as fluid density climbs, the usable volume drops below the 7,011-gallon water rating, so size by weight rather than by gallons when you are storing something heavy like 50% ferric chloride or 98% sulfuric acid. The full load lives entirely on the cone and the support stand, so the stand and ring base you pair with it have to be sized for the loaded total, not the empty shell. Our cone bottom tank stand compatibility matrix walks through the Enduraplas stand pattern, and the Tank Sizing Calculator and Tank Sizing Guide help you confirm volume and footprint against your pad. Review the dimensions and the cone angle on the technical drawing on this page before you pour a foundation or set anchors.
Chemical compatibility
This is a polyethylene cone bottom tank rated to 1.9 specific gravity, which is the highest density rating offered in this line, so no heavier-rated alternative is needed for any chemical below. One point to settle before you order: the resin is crosslinked-versus-linear polyethylene (HDLPE), and that distinction governs chemical service, so confirm the exact grade with us in writing before committing the tank to a specific chemical. The fitting and gasket materials listed are the recommended pairings; verify your exact concentration and operating temperature against the OEM chemical-resistance chart, which is concentration- and temperature-specific, before you order plumbing.
- 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, EPDM gaskets
- Ferric Chloride (50%) — PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) — PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) — PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) — PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) — PVC fittings, Viton gaskets
- Phosphoric Acid (85%) — PVC fittings, Viton gaskets
- Peracetic Acid (30%) — 316SS fittings, Aflas gaskets
- Potassium Hydroxide (saturated) — PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) — PVC fittings, Viton gaskets
- Sulfuric Acid (98%) — CPVC fittings, Viton gaskets
- Urea Solution (50%) — PP/PVC fittings, EPDM gaskets
- Ethylene Glycol (100%), Propylene Glycol, Magnesium Chloride (30%), Sodium Carbonate (30%), Potassium Carbonate (50%), Ferrous Sulfate (20%), Sodium Thiosulfate (40%), Sodium Bisulfate, Sodium Bisulfite, Polyaluminum Chloride, Zinc Orthophosphate, Hydrofluosilicic Acid (26%) — see each page for fitting and gasket pairings
- Ozonated Water (up to 10 PPM) — PVC fittings, EPDM gaskets
For solutions not listed here, or to double-check a borderline concentration, work through our Chemical Compatibility Database. Sodium hypochlorite (bleach) is the common mistake on a tank this size — it must stay under 16.5% concentration and pair with Viton, not EPDM, or the gaskets fail early.
Choosing fittings and instrumentation
The single biggest specification error on a 7,000-gallon cone tank is mismatched fitting and gasket material. Keep three buckets straight: EPDM gaskets with PVC fittings for the salts, glycols, and dilute acids that make up most of this list; Viton gaskets for the oxidizers and strong acids — sulfuric, phosphoric, hydrochloric, hydrofluoric, hydrogen peroxide, and sodium hypochlorite; and 316 stainless wetted parts for DEF (with EPDM) and peracetic acid (with Aflas), where plastic will not hold up. Spec the plumbing to those rules on the first PO and you avoid the most common early failure. On a vessel holding this much liquid, accurate level reading matters too; our guide on tank level gauge selection for chemical service compares radar, ultrasonic, hydrostatic, and magnetostrictive options for tall chemical tanks like this one.
This Enduraplas cone bottom tank ships LTL freight, quoted live to your ZIP from the nearest of two stocking plants — Converse, TX and Neche, ND. On an empty shell this size, origin is the largest freight variable: Gulf and Southern buyers quote against Converse, TX, while Northern Plains and Upper Midwest buyers quote against Neche, ND. Get a number to your ZIP with our Freight Cost Estimator, or call 866-418-1777 to talk through stand pairing, fitting layout, and chemical service before you order.
