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 6000 gallon 15 degree cone bottom tank for bulk storage that drains to the last gallon
The Norwesco 6000 gallon 15 degree cone bottom tank, part number 40931, is a white polyethylene tank 102...
A 3,900 gallon heavy duty black cone bottom tank for chemical service
Snyder Industries part number 5440000N51 is a 3900 gallon heavy duty cone bottom tank in black high density linear polyethylene...
A 3,900 gallon 30 degree cone bottom tank rated for heavy liquids
Snyder part number 5440000N45 is a 3,900 gallon cone bottom tank in white polyethylene: 90 inches in diameter, 180 inches tall and...
A 4,100 gallon white 45 degree cone bottom tank with a 3 year warranty
Snyder part number 5180000N43 is a 4,100 gallon cone bottom tank with a steep 45 degree cone, moulded in white high density...
A 3,900 gallon natural white heavy duty cone bottom tank, 180 inches tall
The Snyder Industries 5440000N42 is a 3,900 gallon heavy duty cone bottom tank in natural white crosslinked linear...
A black 3,900 gallon heavy duty cone bottom tank for heavy liquids that need to stay out of the light
Snyder Industries 5440000N48 is a 3,900 gallon cone bottom tank with the heavy duty wall,...
A 5500 gallon 30 degree cone bottom tank for heavy liquids that must drain to the last gallon
The Norwesco 5500 gallon 30 degree cone bottom tank in blue, part number 40316, is a high density...
A 6000 gallon blue cone bottom tank that drains to the last gallon
The Norwesco 6000 gallon 15 degree cone bottom tank, part number 40933, is a heavy duty polyethylene tank 102 inches in diameter...
The Enduraplas 5000 Gallon White Cone Bottom Tank with Stand (SKU THC05000KW) is a full-drain vessel built for processes where you need the tank to empty completely - settling, batching, dosing, and...
The Enduraplas 5000 Gallon Black Cone Bottom Tank with Stand (SKU THC05000KB) is a full-drain vessel built for process and chemical duty where you need every gallon out the bottom.It stands 175...
The Enduraplas 5000 Gallon Green Cone Bottom Tank with Stand (SKU THC05000KG) is a full-drain vessel built for chemical batching, mixing, and dosing where you need every gallon to gravity-feed out...
A 4,100 gallon natural white cone bottom tank for water, fertilizer and other liquids to 1.5
The Snyder Industries 5180000N40 is a 4,100 gallon cone bottom tank in natural white crosslinked linear...