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 3600 gallon black heavy duty XLPE cone bottom tank for liquids up to 1.9 specific gravity
Snyder Industries part number 8050000N48 is a 3600 gallon cone bottom tank moulded in crosslinked linear...
A 3600 gallon 15 degree cone bottom tank in white for full drain-down
Snyder part number 8050000N42 is a 3600 gallon cone bottom tank, 102 inches in diameter and 125 inches tall, moulded in white...
A 3,900 gallon black cone bottom tank for liquids up to 1.5 specific gravity
Snyder Industries part number 5440000N49 is a 3900 gallon cone bottom tank in black polyethylene with the standard wall...
A 3,900 gallon white cone bottom tank for water and lighter liquids
Snyder part number 5440000N43 is a 3,900 gallon, 30 degree cone bottom tank in white polyethylene, 90 inches in diameter and 180...
A 6000 gallon black cone bottom tank with the shallow 15 degree cone
The Norwesco 6000 gallon 15 degree cone bottom tank in black, part number 42414, is a polyethylene process and storage tank 102...
A 3,900 gallon natural white cone bottom tank for liquids up to 1.5 specific gravity
Snyder Industries part number 5440000N40 is a 3,900 gallon cone bottom tank in natural white crosslinked linear...
A 3,900 gallon black cone bottom tank in the standard wall, for water, fertilizer and brine
The Snyder Industries 5440000N46 holds 3,900 gallons in a black crosslinked linear polyethylene (XLPE)...
A 5500 gallon 30 degree cone bottom tank for blending and full drain-down
The Norwesco 5500 gallon 30 degree cone bottom tank, part number 40549, is a white polyethylene tank 119 inches in diameter...
The Chem-Tainer 2000 Gallon 15-degree open-top cone-bottom tank is a polyethylene bulk vessel built for full-drain chemical and process service where you need solids and residual liquid to move...
The Enduraplas 4000 Gallon White Cone Bottom Tank with Stand (SKU THC04000KW) is a full-drain, SG 1.9-rated polyethylene vessel built for processing and chemical batching where you need the tank to...
The Enduraplas 4000 Gallon Black Cone Bottom Tank with Stand (SKU THC04000KB) is a full-drain chemical storage and batching tank built for operations that need every gallon to empty cleanly through...
The Enduraplas 4000 Gallon Green Cone Bottom Tank with Stand is a full-drain vessel built for chemical batching, blending, and dosing where the tank must empty completely through the bottom. Standing...