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.
The Chem-Tainer 75 Gallon 30-Degree Open Top Cone Bottom Tank (SKU TC3024CA) is a polyethylene cone-bottom tank built for full-drain chemical service where you cannot afford a residual heel. It holds...
The Chem-Tainer 55 Gallon 15 Degree Plastic Vertical Cone Bottom Tank (SKU TC2236CB) is an open-top, cone-bottom polypropylene tank built for batch mixing, settling, and full-drain dispensing where...
The Chem-Tainer 100 Gallon 20 Degree Plastic Vertical Open Top Cone Bottom Tank (SKU TC3036CA) is a 100-gallon polyethylene cone bottom tank built for batch chemical service where you need the vessel...
The Norwesco 200 Gallon Cone Bottom Tank (N-41476) is a polyethylene cone-bottom tank built for full-drain batching and chemical service where the contents need to empty completely without manual...
A 125 gallon 15 degree cone bottom tank with its poly stand, wider than it is tall
The Norwesco 125 gallon 15 degree cone bottom tank with poly stand, part number 43161, is a natural white...
The Norwesco 250 Gallon Cone Bottom Tank (SKU N-41478) is a 1.5 specific-gravity polyethylene tank built for chemical service where you need to fully drain the contents - the cone bottom geometry...
A 300 gallon 15 degree cone bottom tank, tall and narrow for a tight footprint
The Norwesco 300 gallon 15 degree cone bottom tank, part number 41484, is a natural white polyethylene tank 36 inches...
A 300 gallon 45 degree cone bottom tank for mixing and complete drain-down
The Norwesco 300 gallon 45 degree cone bottom tank, part number 43848, is a natural white polyethylene tank 48 inches in...
The Chem-Tainer 75 Gallon 30 Degree Cone Bottom Tank (SKU TC3024CB) is an open-top, cone-bottom polyethylene tank built for batching, dosing, and full-drain chemical service where you need the...
The Norwesco 350 Gallon Cone Bottom Tank (SKU N-41485) is a white polyethylene tank built for batching, settling, and full-drain dispensing where you need the contents to flow out completely instead...
The Enduraplas 60 Gallon 45 Degree Plastic Cone Bottom Tank with Stand pairs a steep-angle conical hopper with an integrated poly stand, built for batch work where liquid needs to drain out...
The Chem-Tainer 200 Gallon 20 Degree Open Top Cone Bottom Tank (SKU TC3165CA) is a polyethylene vertical built for chemical batching and full-drain dosing duty, where the cone keeps solids and sludge...