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 Enduraplas 7011 Gallon Black Cone Bottom Tank is a full-drain bulk vessel built for industrial chemical storage where the contents need to gravity-empty completely. Rated at a 1.9 specific...
The Enduraplas 7011 Gallon Green Cone Bottom Tank is a 7,011-gallon polyethylene bulk-storage vessel with a 144 in by 144 in footprint and an overall height of 141 in. It carries a 1.9...
The Enduraplas 4000 Gallon 15 Degree Plastic Vertical Cone Bottom Tank with Stand is built for process and batching work where you need the tank to drain itself completely. The 15-degree cone bottom...
The 3900 Gallon 30 Degree Plastic Cone Bottom Tank from Snyder Industries is a 3,900-gallon white polyethylene cone bottom tank built for full-drain chemical and process duty. It carries a 1.9...
The Snyder Industries 3900 Gallon Heavy Duty Cone Bottom Tank is built for full-drain bulk chemical service where you cannot afford settled solids or a flat-bottom dead leg. Molded in black High...
The Snyder Industries 4100 Gallon 45 Degree Cone Bottom Tank in white is a high-volume, full-drain vessel for industrial chemical batching, mixing, and storage where you need every gallon to evacuate...
The Snyder Industries 3900 Gallon XLPE Heavy Duty Cone Bottom Tank is built for full-drain chemical batching where you cannot leave product sitting in the bottom. Molded in crosslinked linear...
The Snyder Industries 3900 Gallon XLPE Heavy Duty Cone Bottom Tank is built for the storage and gravity-fed discharge of aggressive process chemicals. Molded in black crosslinked linear polyethylene...
The Enduraplas 6000 Gallon White Cone Bottom Tank is a high-specific-gravity cone-bottom vessel built for full-drain batch processing, where a sloped floor self-empties product between cycles.Molded...
The Enduraplas 6000 Gallon Black Cone Bottom Tank (SKU THC06000B) is a full-drain bulk vessel built for chemical service, molded in black polyethylene rated to 1.9 specific gravity. At 195 inches...
The Enduraplas 6000 Gallon Green Cone Bottom Tank (SKU THC06000G) is a 6000-gallon polyethylene cone bottom tank built for full-drain bulk chemical service. It stands 195 inches tall on a 110 x...
The Norwesco 5500 Gallon 30 Degree HDPE Cone Bottom Tank in blue is built for full-drain chemical and process service where you need the contents to empty completely under gravity. With a 1.9...