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 250 Gallon 20-Degree Open Top Cone Bottom Tank (SKU TC4246CA) is a polyethylene cone-bottom vessel built for batch chemical service where you want liquid to drain toward a center...
The 100 Gallon Chem-Tainer Cone Bottom Tank with Poly Stand (SKU TC3148JP) is a closed-top, cone-bottom polyethylene tank molded in natural white and shipped on a matching poly stand so the cone...
The Chem-Tainer 100 Gallon 15 Degree Plastic Vertical Cone Bottom Tank (SKU TC3036CB) is a closed-top polyethylene cone bottom tank built for chemical batching and full-drain dispensing where you...
The Norwesco 310 Gallon 30 Degree Vertical Cone Bottom Tank (SKU N-62441) is a closed-top, white polyethylene tank rated to a 1.5 specific gravity, sold with its matching poly stand so the 30-degree...
The Chemtainer 100 Gallon 15 Degree Vertical Cone Bottom Tank (SKU TC3048AP-BLACK) is a closed-top polyethylene tank with a 15-degree cone bottom seated on a matching poly stand, built for chemical...
The Enduraplas 550 Gallon 15 Degree Plastic Vertical Cone Bottom Tank (SKU THC00550) is built for batching, mixing, and full-drain dispensing where the contents need to empty completely through the...
The Enduraplas 550 Gallon White Cone Bottom Tank is built for full-drainage chemical batching and dosing, where you need every gallon to gravity-feed out the bottom instead of leaving sediment or...
The Enduraplas 550 Gallon Black Cone Bottom Tank is a 550-gallon polyethylene cone-bottom tank built for processes that need to drain completely - the angled bottom empties to the center outlet so...
The Enduraplas 550 Gallon Green Cone Bottom Tank (SKU THC00550G) is a polyethylene cone bottom tank built for full-drain chemical and process service where you need every gallon to discharge through...
The Norwesco 300 Gallon 30 Degree Cone Bottom Tank with Poly Stand (SKU N-43730, black) is built to fully drain aggressive liquids: the 30-degree cone floor routes contents to the 2" outlet so...
The Norwesco 550 Gallon 20 Degree Cone Bottom Tank (SKU N-44647) is built for full-drain chemical batching and process work where the contents need to empty completely through the cone. It holds 550...
The Chem-Tainer 125 Gallon 20 Degree Open Top Cone Bottom Tank (SKU TC4224CA) is a polyethylene cone-bottom vessel built for batch mixing, settling, and full-drain chemical service, where solids and...