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.
325 gallon white cone bottom tank with stand, 30 degree cone, for batches that drain to the last gallon
SII-1560500N45 is a 325 gallon Snyder cone bottom tank with a 30 degree cone and its own...
A 1,250 gallon black heavy duty cone bottom tank with a low profile
Snyder Industries part number 8310000N48 is a heavy duty 1,250 gallon cone bottom tank in black crosslinked linear polyethylene...
A 2500 gallon heavy duty 30 degree cone bottom tank for complete drainage
The Norwesco 2500 gallon 30 degree cone bottom tank, part number 40129, is a light blue high density linear polyethylene...
A 1,400 gallon natural white heavy duty cone bottom tank, 80 inches tall
Snyder Industries part number 1900000N42 is a heavy duty 1,400 gallon cone bottom tank in natural white crosslinked linear...
A 1,400 gallon black heavy duty cone bottom tank, 86 inches across
Snyder Industries part number 1900000N48 is the black version of the 1,400 gallon 1900000 heavy duty cone. It is moulded in...
A 3000 gallon 30 degree cone bottom tank that drains itself empty
The Norwesco 3000 gallon 30 degree cone bottom tank, part number 40170, is a natural white polyethylene (HDPE) tank 96 inches in...
The black sixteen hundred on the same ninety-five inch shell
This is the black listing of Snyder's 1,600 gallon heavy duty cone bottom tank. The 8330000N51 is listed 95 inches long, 95 inches wide...
An 850 gallon Snyder cone bottom tank, tall and slim, for liquids up to 1.1 specific gravity
The Snyder Industries 850 gallon 15 degree plastic cone bottom tank, part number 1810100N45, is a white...
A 3000 gallon 15 degree cone bottom tank with a 3 inch outlet
The Norwesco 3000 gallon 15 degree cone bottom tank, part number 45141, is a white polyethylene tank 91 inches in diameter and 120...
A 1650 gallon black cone bottom tank for batches that have to leave clean
The Snyder Industries 1650 gallon heavy duty cone bottom tank, part number 1910000N51, is a black high density linear...
A 1650 gallon 30 degree cone bottom tank under eight feet tall, for a building with a low roof
Snyder part number 1910000N45 is a 1650 gallon cone bottom tank in white polyethylene, 86 inches in...
A 1600 gallon 30 degree cone bottom tank with its poly stand, set and plumb
The Norwesco 1600 gallon 30 degree cone bottom tank with poly stand, part number 40813, is the tank and a polyethylene...