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 black 4,100 gallon cone bottom tank for liquids that settle and must drain clean
Snyder Industries 5180000N46 is a 4,100 gallon black cone bottom tank in crosslinked linear polyethylene (XLPE), 90...
5,000 gallon 15 degree cone bottom tank on a 102 inch base
The Snyder 8050200N42 is a white polyethylene closed-top cone bottom tank, 102 inches across and 176 inches tall on its stand, holding...
A 4,400 gallon black cone bottom tank with the standard wall
Snyder Industries part number 5200000N49 is a 4400 gallon cone bottom tank in black polyethylene. It is 90 inches in diameter and 200...
A 4,400 gallon white cone bottom tank for water and fertilizer-weight liquids
Snyder part number 5200000N43 is a 4,400 gallon, 30 degree cone bottom tank in white polyethylene. It is 90 inches in...
A 7500 gallon black cone bottom tank for process and bulk storage
The Norwesco 7500 gallon black cone bottom tank, part number 42976, is a polyethylene process and storage tank 141 inches in...
A 4100 gallon 45 degree cone bottom tank for bulk liquids that carry solids
Snyder part number 5180000N49 is a 4100 gallon vertical cone bottom tank with a 45 degree cone, moulded in white high...
A 7500 gallon 30 degree cone bottom tank for bulk blending and clean drain-down
The Norwesco 7500 gallon 30 degree cone bottom tank, part number 40551, is a white polyethylene tank 141 inches in...
A 4,100 gallon heavy duty black cone bottom tank for dense chemicals and brines
Snyder Industries part number 5180000N51 is a 4100 gallon heavy duty cone bottom tank in black high density linear...
A 4,100 gallon 45 degree cone bottom tank that drains to the last drop
Snyder part number 5180000N45 is a 4,100 gallon cone bottom tank in white polyethylene with a steep 45 degree cone. It is 90...
A 4,100 gallon heavy duty cone bottom tank in natural white for dense treatment chemicals
Snyder Industries 5180000N42 is a natural white, heavy duty cone bottom tank holding 4,100 gallons. It is...
A black 4,100 gallon heavy duty cone bottom tank rated to 1.9 specific gravity
Part number 5180000N48 is the black, heavy duty version of Snyder Industries' 4,100 gallon cone bottom tank. The shell...
The Enduraplas 6000 Gallon White Cone Bottom Tank with Stand (SKU THC06000KW) is a full-drain vessel built for chemical batching, mixing, and metering where you need the tank to empty completely. It...