Cone-bottom (also called cone-bottom or full-drain) polyethylene tanks are engineered for applications where complete sediment evacuation, batch mixing, or downstream dosing matters. The angled bottom — 15°, 22.5°, 30°, 45°, or 60° from horizontal — drives settled solids toward the centerline drain and lets you empty the vessel to a true zero residual. Our catalog covers every active SKU from Norwesco, Snyder Industries, Chem-Tainer, Enduraplas, and Bushman.
Applications
Batch mixing of fertilizers, surfactants, and process chemicals — solids settle and drain cleanly
Chemical inductor / dissolution service — dry chemical mixing into water before spray
Wastewater pre-treatment — solids drop-out and decant
Slurry storage and dewatering — sand, polymer, sediment ponds
Total-drain chemical feed for metering pumps (no dead-leg residue)
Compliance & Standards
Typically rotomolded to ASTM D1998; FDA 21 CFR 177.1520 resin compliance varies by model (see each product's Specifications). Cone bottoms must be supported by a properly rated steel stand — every cone-bottom tank is shipped with or sized for a matching stand (verify on each listing). Stand height equals cone height plus minimum 6" clearance for valve/discharge piping. Confirm working SG rating against your fluid; cone-bottom geometry concentrates head pressure at the centerline drain.
Engineering & Selection
Cone angle directly governs how cleanly your tank will drain. 15° works for free-flowing liquids only. 22.5°–30° is the sweet spot for most chemical and fertilizer service. 45°–60° is required for slurries, settled solids, or viscous fluids — anything that won't self-flow at shallower angles. Steeper cone means taller overall height and a taller stand, so verify ceiling clearance before ordering. Outlet sizing scales with intended flow rate: 2" for gravity discharge to drum, 3"–4" for pump suction or batch transfer.
Freight & Delivery
Tanks ship LTL motor freight from the closest stocking warehouse to your delivery ZIP. Typical transit 5–10 business days. Liftgate available at delivery (per-shipment fee). Always inspect at delivery and note damage on the bill of lading before signing — that is the carrier claim trigger. Bulk-order consolidation reduces per-tank freight 25–40%. Get your LTL freight quote by ZIP, or call 866-418-1777 for same-business-day quoted pricing.
Sizing & Selection
Capacity first, cone angle second, stand height third. Need help matching cone angle to your fluid? Call 866-418-1777 with your fluid, viscosity, and dosing requirements.
The Norwesco 4950 Gallon 15 Degree Cone Bottom Tank (SKU N-45381) is a 4,950-gallon polyethylene cone-bottom vessel rated to 1.5 specific gravity, built for full-drain handling of process liquids and...
The Snyder Industries 4600 Gallon 15 Degree Cone Bottom Tank (SII-8050100N43) is a closed-top, full-drain vessel built in white High Density Linear Polyethylene with a 1.5 specific gravity rating,...
The Enduraplas 4000 Gallon White Cone Bottom Tank is a full-drain vessel built for chemical and process service where you need to empty the tank completely between batches. The cone geometry sends...
The Enduraplas 4000 Gallon Black Cone Bottom Tank is built for full-drain bulk chemical service, with a 1.9 specific-gravity rating that puts it among the heaviest-duty polyethylene cone tanks in the...
The Enduraplas 4000 Gallon Green Cone Bottom Tank is a 4,000-gallon polyethylene cone bottom tank built for full-drain bulk chemical storage. Molded in green and carrying a 1.9 specific gravity...
The Snyder Industries 3600 Gallon XLPE Cone Bottom Tank is a full-drain crosslinked polyethylene vessel built for bulk chemical batching, blending, and metering where you need to empty completely...
The Snyder Industries 3600 Gallon Black XLPE Cone Bottom Tank is built for full-drain chemical service: a crosslinked linear polyethylene shell rated to 1.5 specific gravity, with a cone that empties...
The Snyder Industries 3000 Gallon Cone Bottom Tank with Poly Stand (part 40553, SKU SII-8360037) is a closed-top, 30-degree full-drain vessel molded in white High Density Linear Polyethylene and...
The Enduraplas 3000 Gallon Cone Bottom Tank with Poly Stand (part 40553, SKU 8360037) is a full-drain vessel built for batching, mixing, and dosing where the tank has to empty completely between runs...
The Snyder Industries 2600 Gallon XLPE Heavy Duty Cone Bottom Tank is built for full-drain chemical service where the contents need to empty completely and the chemistry is too aggressive for a...
The Snyder Industries 2600 Gallon Black XLPE Heavy Duty Cone Bottom Tank is a 2,600-gallon crosslinked linear polyethylene (XLPE) vessel built for the punishing end of chemical storage and mixing...
The Norwesco 4950 Gallon 15 Degree HDPE Vertical Cone Bottom Tank (SKU N-45383) is a blue, full-drain cone bottom tank molded in high density linear polyethylene and rated to 1.9 specific gravity,...