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.
A 10000 gallon heavy duty 15 degree cone bottom tank for liquids up to 1.9 specific gravity
The Norwesco 10000 gallon 15 degree HDPE vertical cone bottom tank, part number 44461, is a blue high...
The Enduraplas 7011 Gallon White Cone Bottom Tank with Stand is built for high-volume batching, mixing, and full-drain chemical storage where you need the contents to empty completely through the...
The Enduraplas 7011 gallon black cone bottom tank with stand is a full-drain vessel built for continuous chemical batching, mixing, and storage where you need every gallon to gravity-empty toward the...
The Enduraplas 7011 Gallon Green Cone Bottom Tank with Stand (SKU THC07011KG) is a full-drain polyethylene vessel built for process, batching, and chemical storage where you need the tank to empty...
A 10000 gallon 30 degree cone bottom tank in black, for heavy liquids that need the light kept out
Part number 44984 is Norwesco's 10000 gallon cone bottom tank with a 30 degree cone, moulded in...
A 10000 gallon 30 degree cone bottom tank in light blue, rated for heavy liquids
Part number 44105 is Norwesco's 10000 gallon cone bottom tank with a 30 degree cone, moulded in light blue high...
The Enduraplas 8000 Gallon White Cone Bottom Tank with Stand (SKU THC08000KW) is a full-drain vessel built for high-density chemical batching, mixing, and storage where you need the tank to empty...
The Enduraplas 8000 Gallon Black Cone Bottom Tank with Stand (SKU THC08000KB) is a full-drain vessel built for batching, dosing, and storage where you need every gallon to empty by gravity. The tank...
The Enduraplas 8000 Gallon Green Cone Bottom Tank with Stand (SKU THC08000KG) is a full-drain vessel built for chemical batching, storage, and metering where you need every gallon to evacuate through...
A 5,500 gallon black heavy duty cone bottom tank for heavy liquids
Snyder Industries part number 7040000N51 is a 5500 gallon heavy duty cone bottom tank in black high density linear polyethylene, 90...
A 5,500 gallon 30 degree cone bottom tank for heavy liquids and tall buildings
Snyder part number 7040000N45 is a 5,500 gallon cone bottom tank in white polyethylene, 90 inches in diameter and 241...
7400 gallon natural white heavy duty cone bottom tank for bulk liquids that must drain clean
Snyder part number 5320100N45 is a 7400 gallon heavy duty cone bottom tank in natural white high density...